Multiple tbl(7) improvements:

* Do not discard data that lacks a matching layout cell but remains
within the number of columns of the table as a whole.
* Do not insert dummy data rows for any layout row starting with a
horizontal line, but only for layout rows that would discard all
the data on a matching non-empty data row.
* Print horizontal lines specified in the layout even if there is
no matching data cell.
* Improve the logic for extending vertical lines to adjacent rows,
for choosing cross marks versus line segments, and some related details.

5 files changed, 12052 insertions, 3 deletions

diff --git a/regress/tbl/layout/Makefile b/regress/tbl/layout/Makefile
index 9ad5d7f9..9cc65754 100644
--- a/regress/tbl/layout/Makefile
+++ b/regress/tbl/layout/Makefile
@@ -1,12 +1,15 @@
 # $OpenBSD: Makefile,v 1.2 2015/01/30 00:27:09 schwarze Exp $
 
-REGRESS_TARGETS	 = center complex empty emptyline numbers span
+REGRESS_TARGETS	 = center complex empty emptyline
+REGRESS_TARGETS	+= lines lines-nogroff numbers span
 LINT_TARGETS	 = complex empty
 
-# groff-1.22.3 defect:
+# groff-1.22.3 defects:
 # - When the layout is completely empty,
 #   GNU eqn produces no output whatsoever for the whole table.
+# - When there is no horizontal line at the top,
+#   vertical lines extend beyond the top of the table.
 
-SKIP_GROFF	 = empty
+SKIP_GROFF	 = empty lines-nogroff
 
 .include <bsd.regress.mk>
diff --git a/regress/tbl/layout/lines-nogroff.in b/regress/tbl/layout/lines-nogroff.in
new file mode 100644
index 00000000..9ed94675
--- /dev/null
+++ b/regress/tbl/layout/lines-nogroff.in
@@ -0,0 +1,207 @@
+.Dd June 15, 2017
+.Dt TBL-LAYOUT-LINES-NOGROFF 1
+.Os OpenBSD
+.Sh NAME
+.Nm tbl-layout-lines
+.Nd table cells containing lines, misformatting with groff
+.Sh DESCRIPTION
+vline top left:
+.sp
+.TS
+tab(:);
+| l l
+  l l.
+11:12
+21:22
+.TE
+.sp
+hline and vline top left:
+.sp
+.TS
+tab(:);
+_| l
+l  l.
+:12
+21:22
+.TE
+.sp
+vline and hline top left:
+.sp
+.TS
+tab(:);
+| _ l
+  l l.
+:12
+21:22
+.TE
+.sp
+vline top:
+.sp
+.TS
+tab(:);
+l| l
+l  l.
+11:12
+21:22
+.TE
+.sp
+vline and hline top:
+.sp
+.TS
+tab(:);
+l| _ l
+l  l l.
+11::13
+21:22:23
+.TE
+.sp
+hline and vline top:
+.sp
+.TS
+tab(:);
+l _| l
+l l  l.
+11::13
+21:22:23
+.TE
+.sp
+hline, vline, hline top:
+.sp
+.TS
+tab(:);
+l _| _ l
+l l  l l.
+11:::13
+21:22:23:24
+.TE
+.sp
+vline top right:
+.sp
+.TS
+tab(:);
+l l|
+l l.
+11:12
+21:22
+.TE
+.sp
+vline and hline top right:
+.sp
+.TS
+tab(:);
+l| _
+l  l.
+11:
+21:22
+.TE
+.sp
+hline and vline top right:
+.sp
+.TS
+tab(:);
+l _|
+l l.
+11:
+21:22
+.TE
+.sp
+double vline top left:
+.sp
+.TS
+tab(:);
+|| l l
+   l l.
+11:12
+21:22
+.TE
+.sp
+hline and double vline top left:
+.sp
+.TS
+tab(:);
+_|| l
+l   l.
+:12
+21:22
+.TE
+.sp
+double vline and hline top left:
+.sp
+.TS
+tab(:);
+|| _ l
+   l l.
+:12
+21:22
+.TE
+.sp
+double vline top:
+.sp
+.TS
+tab(:);
+l|| l
+l   l.
+11:12
+21:22
+.TE
+.sp
+double vline and hline top:
+.sp
+.TS
+tab(:);
+l|| _ l
+l   l l.
+11::13
+21:22:23
+.TE
+.sp
+hline and double vline top:
+.sp
+.TS
+tab(:);
+l _|| l
+l l   l.
+11::13
+21:22:23
+.TE
+.sp
+hline, double vline, hline top:
+.sp
+.TS
+tab(:);
+l _|| _ l
+l l   l l.
+11:::13
+21:22:23:24
+.TE
+.sp
+double vline top right:
+.sp
+.TS
+tab(:);
+l l||
+l l.
+11:12
+21:22
+.TE
+.sp
+double vline and hline top right:
+.sp
+.TS
+tab(:);
+l|| _
+l   l.
+11:
+21:22
+.TE
+.sp
+hline and double vline top right:
+.sp
+.TS
+tab(:);
+l _||
+l l.
+11:
+21:22
+.TE
+.sp
diff --git a/regress/tbl/layout/lines-nogroff.out_ascii b/regress/tbl/layout/lines-nogroff.out_ascii
new file mode 100644
index 00000000..f7563208
--- /dev/null
+++ b/regress/tbl/layout/lines-nogroff.out_ascii
@@ -0,0 +1,108 @@
+TBL-LAYOUT-LINES-NOGROFF(1)                            General Commands Manual
+
+NNAAMMEE
+     ttbbll--llaayyoouutt--lliinneess - table cells containing lines, misformatting with groff
+
+DDEESSCCRRIIPPTTIIOONN
+     vline top left:
+
+     |11   12
+      21   22
+
+     hline and vline top left:
+
+     ---+ 12
+     21   22
+
+     vline and hline top left:
+
+     +---- 12
+      21   22
+
+     vline top:
+
+     11 | 12
+     21   22
+
+     vline and hline top:
+
+     11 +----- 13
+     21   22   23
+
+     hline and vline top:
+
+     11 -----+ 13
+     21   22   23
+
+     hline, vline, hline top:
+
+     11 -----+----- 13
+     21   22   23   24
+
+     vline top right:
+
+     11   12 |
+     21   22
+
+     vline and hline top right:
+
+     11 +----
+     21   22
+
+     hline and vline top right:
+
+     11 -----+
+     21   22
+
+     double vline top left:
+
+     |11   12
+      21   22
+
+     hline and double vline top left:
+
+     ---+|12
+     21   22
+
+     double vline and hline top left:
+
+     +---- 12
+      21   22
+
+     double vline top:
+
+     11 ||12
+     21   22
+
+     double vline and hline top:
+
+     11 ++---- 13
+     21   22   23
+
+     hline and double vline top:
+
+     11 -----+|13
+     21   22   23
+
+     hline, double vline, hline top:
+
+     11 -----++---- 13
+     21   22   23   24
+
+     double vline top right:
+
+     11   12 |
+     21   22
+
+     double vline and hline top right:
+
+     11 ++---
+     21   22
+
+     hline and double vline top right:
+
+     11 -----+
+     21   22
+
+
+OpenBSD                          June 15, 2017                         OpenBSD
diff --git a/regress/tbl/layout/lines.in b/regress/tbl/layout/lines.in
new file mode 100644
index 00000000..cd345f42
--- /dev/null
+++ b/regress/tbl/layout/lines.in
@@ -0,0 +1,6976 @@
+.Dd June 15, 2017
+.Dt TBL-LAYOUT-LINES 1
+.Os OpenBSD
+.Sh NAME
+.Nm tbl-layout-lines
+.Nd table cells containing lines
+.Sh DESCRIPTION
+.pl 8000
+hline top left:
+.TS
+tab(:);
+_ l
+l l.
+:12
+21:22
+.TE
+.sp
+hline top:
+.TS
+tab(:);
+l _ l
+l l l.
+11::13
+21:22:23
+.TE
+.sp
+double hline top:
+.TS
+tab(:);
+l _ _ l
+l l l l.
+11:::13
+21:22:23:24
+.TE
+.sp
+hline top right:
+.TS
+tab(:);
+l _
+l l.
+11:
+21:22
+.TE
+.sp
+hline in front:
+.TS
+tab(:);
+l l
+_ l
+l l.
+11:12
+:22
+31:32
+.TE
+.sp
+vline in front:
+.TS
+tab(:);
+  l l
+  l l
+| l l
+  l l.
+11:12
+21:22
+31:32
+41:42
+.TE
+.sp
+hline and vline in front:
+.TS
+tab(:);
+l  l
+l  l
+_| l
+l  l.
+11:12
+21:22
+:32
+41:42
+.TE
+.sp
+vline and hline in front:
+.TS
+tab(:);
+  l l
+  l l
+| _ l
+  l l.
+11:12
+21:22
+:32
+41:42
+.TE
+.sp
+hline in the middle:
+.TS
+tab(:);
+l l l
+l _ l
+l l l.
+11:12:13
+21::23
+31:32:33
+.TE
+.sp
+vline in the middle:
+.TS
+tab(:);
+l  l l
+l  l l
+l| l l
+l  l l.
+11:12:13
+21:22:23
+31:32:33
+41:42:43
+.TE
+.sp
+vline and hline in the middle:
+.TS
+tab(:);
+l  l l
+l  l l
+l| _ l
+l  l l.
+11:12:13
+21:22:23
+31::33
+41:42:43
+.TE
+.sp
+hline and vline in the middle:
+.TS
+tab(:);
+l l  l
+l l  l
+l _| l
+l l  l.
+11:12:13
+21:22:23
+31::33
+41:42:43
+.TE
+.sp
+double hline in the middle:
+.TS
+tab(:);
+l l l l
+l _ _ l
+l l l l.
+11:12:13:14
+21:::24
+31:32:33:34
+.TE
+.sp
+hline, vline, hline in the middle:
+.TS
+tab(:);
+l l  l l
+l l  l l
+l _| _ l
+l l  l l.
+11:12:13:14
+21:22:23:24
+31:::34
+41:42:43:44
+.TE
+.sp
+hline at the end:
+.TS
+tab(:);
+l l
+l _
+l l.
+11:12
+21:
+31:32
+.TE
+.sp
+vline at the end:
+.TS
+tab(:);
+l l
+l l
+l l|
+l l.
+11:12
+21:22
+31:32
+41:42
+.TE
+.sp
+vline and hline at the end:
+.TS
+tab(:);
+l  l
+l  l
+l| _
+l  l.
+11:12
+21:22
+31:
+41:42
+.TE
+.sp
+hline and vline at the end:
+.TS
+tab(:);
+l l
+l l
+l _|
+l l.
+11:12
+21:22
+31:
+41:42
+.TE
+.sp
+hline bottom left:
+.TS
+tab(:);
+l l
+_ l.
+11:12
+:22
+.TE
+.sp
+vline bottom left:
+.TS
+tab(:);
+  l l
+  l l
+| l l.
+11:12
+21:22
+31:32
+.TE
+.sp
+hline and vline bottom left:
+.TS
+tab(:);
+l  l
+l  l
+_| l.
+11:12
+21:22
+:32
+.TE
+.sp
+vline and hline bottom left:
+.TS
+tab(:);
+  l l
+  l l
+| _ l.
+11:12
+21:22
+:32
+.TE
+.sp
+double hline bottom:
+.TS
+tab(:);
+l l l l
+l _ _ l.
+11:12:13:14
+21:::24
+.TE
+.sp
+hline, vline, hline bottom:
+.TS
+tab(:);
+l l  l l
+l l  l l
+l _| _ l.
+11:12:13:14
+21:22:23:24
+31:::34
+.TE
+.sp
+hline bottom right:
+.TS
+tab(:);
+l l
+l _.
+11:12
+21:
+.TE
+.sp
+vline bottom right:
+.TS
+tab(:);
+l l
+l l
+l l|.
+11:12
+21:22
+31:32
+.TE
+.sp
+vline and hline bottom right:
+.TS
+tab(:);
+l  l
+l  l
+l| _.
+11:12
+21:22
+31:
+.TE
+.sp
+hline and vline bottom right:
+.TS
+tab(:);
+l l
+l l
+l _|.
+11:12
+21:22
+31:
+.TE
+.sp
+double vline in front:
+.TS
+tab(:);
+   l l
+   l l
+|| l l
+   l l.
+11:12
+21:22
+31:32
+41:42
+.TE
+.sp
+hline and double vline in front:
+.TS
+tab(:);
+l   l
+l   l
+_|| l
+l   l.
+11:12
+21:22
+:32
+41:42
+.TE
+.sp
+double vline and hline in front:
+.TS
+tab(:);
+   l l
+   l l
+|| _ l
+   l l.
+11:12
+21:22
+:32
+41:42
+.TE
+.sp
+double vline in the middle:
+.TS
+tab(:);
+l   l l
+l   l l
+l|| l l
+l   l l.
+11:12:13
+21:22:23
+31:32:33
+41:42:43
+.TE
+.sp
+double vline and hline in the middle:
+.TS
+tab(:);
+l   l l
+l   l l
+l|| _ l
+l   l l.
+11:12:13
+21:22:23
+31::33
+41:42:43
+.TE
+.sp
+hline and doble vline in the middle:
+.TS
+tab(:);
+l l   l
+l l   l
+l _|| l
+l l   l.
+11:12:13
+21:22:23
+31::33
+41:42:43
+.TE
+.sp
+hline, double vline, hline in the middle:
+.TS
+tab(:);
+l l   l l
+l l   l l
+l _|| _ l
+l l   l l.
+11:12:13:14
+21:22:23:24
+31:::34
+41:42:43:44
+.TE
+.sp
+double vline at the end:
+.TS
+tab(:);
+l l
+l l
+l l||
+l l.
+11:12
+21:22
+31:32
+41:42
+.TE
+.sp
+double vline and hline at the end:
+.TS
+tab(:);
+l   l
+l   l
+l|| _
+l   l.
+11:12
+21:22
+31:
+41:42
+.TE
+.sp
+hline and double vline at the end:
+.TS
+tab(:);
+l l
+l l
+l _||
+l l.
+11:12
+21:22
+31:
+41:42
+.TE
+.sp
+double vline bottom left:
+.TS
+tab(:);
+   l l
+   l l
+|| l l.
+11:12
+21:22
+31:32
+.TE
+.sp
+hline and double vline bottom left:
+.TS
+tab(:);
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+l   l
+_|| l.
+11:12
+21:22
+:32
+.TE
+.sp
+double vline and hline bottom left:
+.TS
+tab(:);
+   l l
+   l l
+|| _ l.
+11:12
+21:22
+:32
+.TE
+.sp
+hline, double vline, hline bottom:
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+tab(:);
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+l l   l l
+l _|| _ l.
+11:12:13:14
+21:22:23:24
+31:::34
+.TE
+.sp
+double vline bottom right:
+.TS
+tab(:);
+l l
+l l
+l l||.
+11:12
+21:22
+31:32
+.TE
+.sp
+double vline and hline bottom right:
+.TS
+tab(:);
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+l   l
+l|| _.
+11:12
+21:22
+31:
+.TE
+.sp
+hline and double vline bottom right:
+.TS
+tab(:);
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+l l
+l _||.
+11:12
+21:22
+31:
+.TE
+.sp
+vline left below hline top left:
+.TS
+tab(:);
+  _ l
+| l l
+  l l.
+:12
+21:22
+31:32
+.TE
+.sp
+vline right below hline top left:
+.TS
+tab(:);
+_  l
+l| l
+l  l.
+:12
+21:22
+31:32
+.TE
+.sp
+vline left below hline at the top:
+.TS
+tab(:);
+l  _ l
+l| l l
+l  l l.
+11::13
+21:22:23
+31:32:33
+.TE
+.sp
+vline right below hline at the top:
+.TS
+tab(:);
+l _  l
+l l| l
+l l  l.
+11::13
+21:22:23
+31:32:33
+.TE
+.sp
+vline below hline at the top:
+.TS
+tab(:);
+l _  _ l
+l l| l l
+l l  l l.
+11:::14
+21:22:23:24
+31:32:33:34
+.TE
+.sp
+vline left below hline top right:
+.TS
+tab(:);
+l  _
+l| l
+l  l.
+11:
+21:22
+31:32
+.TE
+.sp
+vline right below hline top right:
+.TS
+tab(:);
+l _
+l l|
+l l.
+11:
+21:22
+31:32
+.TE
+.sp
+vline left below hline in front:
+.TS
+tab(:);
+  l l
+  _ l
+| l l
+  l l.
+11:12
+:22
+31:32
+41:42
+.TE
+.sp
+vline left above hline in front:
+.TS
+tab(:);
+  l l
+  l l
+| l l
+  _ l
+  l l.
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+31:32
+:42
+51:52
+.TE
+.sp
+vline right below hline in front:
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+:22
+31:32
+41:42
+.TE
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+21::23
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+.TE
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+41::43
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+41::43
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+.TE
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+.TE
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+51:52
+.TE
+.sp
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+.TS
+tab(:);
+  l l
+  l l
+| l l
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+:42
+.TE
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+21:22
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+:42
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+41::43
+.TE
+.sp
+vline right above hline at the bottom:
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+tab(:);
+l l  l
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+11:12:13
+21:22:23
+31:32:33
+41::43
+.TE
+.sp
+vline above hline at the bottom:
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+l l  l l
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+11:12:13:14
+21:22:23:24
+31:32:33:34
+41:::44
+.TE
+.sp
+vline left above hline bottom right:
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+| l l
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+doublebox allbox tab(:);
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+|| l l
+   l l.
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+l _   l
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+|| l l
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+21:22:23
+31:32:33
+41::43
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+l _   _ l.
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+21:22:23:24
+31:32:33:34
+41:::44
+.TE
+.sp 2v
+double vline left above hline bottom right:
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+doublebox allbox tab(:);
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+l   l
+l|| l
+l   _.
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+21:22
+31:32
+41:
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diff --git a/regress/tbl/layout/lines.out_ascii b/regress/tbl/layout/lines.out_ascii
new file mode 100644
index 00000000..24d07d0d
--- /dev/null
+++ b/regress/tbl/layout/lines.out_ascii
@@ -0,0 +1,4755 @@
+TBL-LAYOUT-LINES(1)         General Commands Manual        TBL-LAYOUT-LINES(1)
+
+NNAAMMEE
+     ttbbll--llaayyoouutt--lliinneess - table cells containing lines
+
+DDEESSCCRRIIPPTTIIOONN
+     hline top left:
+     ---- 12
+     21   22
+
+     hline top:
+     11 ------ 13
+     21   22   23
+
+     double hline top:
+     11 ----------- 13
+     21   22   23   24
+
+     hline top right:
+     11 -----
+     21   22
+
+     hline in front:
+     11   12
+     ---- 22
+     31   32
+
+     vline in front:
+      11   12
+     |21   22
+     |31   32
+      41   42
+
+     hline and vline in front:
+     11   12
+     21 | 22
+     ---+ 32
+     41   42
+
+     vline and hline in front:
+      11   12
+     |21   22
+     +---- 32
+      41   42
+
+     hline in the middle:
+     11   12   13
+     21 ------ 23
+     31   32   33
+
+     vline in the middle:
+     11   12   13
+     21 | 22   23
+     31 | 32   33
+     41   42   43
+
+     vline and hline in the middle:
+     11   12   13
+     21 | 22   23
+     31 +----- 33
+     41   42   43
+
+     hline and vline in the middle:
+     11   12   13
+     21   22 | 23
+     31 -----+ 33
+     41   42   43
+
+     double hline in the middle:
+     11   12   13   14
+     21 ----------- 24
+     31   32   33   34
+
+     hline, vline, hline in the middle:
+     11   12   13   14
+     21   22 | 23   24
+     31 -----+----- 34
+     41   42   43   44
+
+     hline at the end:
+     11   12
+     21 -----
+     31   32
+
+     vline at the end:
+     11   12
+     21   22 |
+     31   32 |
+     41   42
+
+     vline and hline at the end:
+     11   12
+     21 | 22
+     31 +----
+     41   42
+
+     hline and vline at the end:
+     11   12
+     21   22 |
+     31 -----+
+     41   42
+
+     hline bottom left:
+     11   12
+     ---- 22
+
+     vline bottom left:
+      11   12
+     |21   22
+     |31   32
+
+     hline and vline bottom left:
+     11   12
+     21 | 22
+     ---+ 32
+
+     vline and hline bottom left:
+      11   12
+     |21   22
+     +---- 32
+
+     double hline bottom:
+     11   12   13   14
+     21 ----------- 24
+
+     hline, vline, hline bottom:
+     11   12   13   14
+     21   22 | 23   24
+     31 -----+----- 34
+
+     hline bottom right:
+     11   12
+     21 -----
+
+     vline bottom right:
+     11   12
+     21   22 |
+     31   32 |
+
+     vline and hline bottom right:
+     11   12
+     21 | 22
+     31 +----
+
+     hline and vline bottom right:
+     11   12
+     21   22 |
+     31 -----+
+
+     double vline in front:
+      11   12
+     |21   22
+     |31   32
+      41   42
+
+     hline and double vline in front:
+     11   12
+     21 ||22
+     ---+|32
+     41   42
+
+     double vline and hline in front:
+      11   12
+     |21   22
+     +---- 32
+      41   42
+
+     double vline in the middle:
+     11   12   13
+     21 ||22   23
+     31 ||32   33
+     41   42   43
+
+     double vline and hline in the middle:
+     11   12   13
+     21 ||22   23
+     31 ++---- 33
+     41   42   43
+
+     hline and doble vline in the middle:
+     11   12   13
+     21   22 ||23
+     31 -----+|33
+     41   42   43
+
+     hline, double vline, hline in the middle:
+     11   12   13   14
+     21   22 ||23   24
+     31 -----++---- 34
+     41   42   43   44
+
+     double vline at the end:
+     11   12
+     21   22 |
+     31   32 |
+     41   42
+
+     double vline and hline at the end:
+     11   12
+     21 ||22
+     31 ++---
+     41   42
+
+     hline and double vline at the end:
+     11   12
+     21   22 |
+     31 -----+
+     41   42
+
+     double vline bottom left:
+      11   12
+     |21   22
+     |31   32
+
+     hline and double vline bottom left:
+     11   12
+     21 ||22
+     ---+|32
+
+     double vline and hline bottom left:
+      11   12
+     |21   22
+     +---- 32
+
+     hline, double vline, hline bottom:
+     11   12   13   14
+     21   22 ||23   24
+     31 -----++---- 34
+
+     double vline bottom right:
+     11   12
+     21   22 |
+     31   32 |
+
+     double vline and hline bottom right:
+     11   12
+     21 ||22
+     31 ++---
+
+     hline and double vline bottom right:
+     11   12
+     21   22 |
+     31 -----+
+
+     vline left below hline top left:
+     +---- 12
+     |21   22
+      31   32
+
+     vline right below hline top left:
+     ---+ 12
+     21 | 22
+     31   32
+
+     vline left below hline at the top:
+     11 +----- 13
+     21 | 22   23
+     31   32   33
+
+     vline right below hline at the top:
+     11 -----+ 13
+     21   22 | 23
+     31   32   33
+
+     vline below hline at the top:
+     11 -----+----- 14
+     21   22 | 23   24
+     31   32   33   34
+
+     vline left below hline top right:
+     11 +----
+     21 | 22
+     31   32
+
+     vline right below hline top right:
+     11 -----+
+     21   22 |
+     31   32
+
+     vline left below hline in front:
+      11   12
+     +---- 22
+     |31   32
+      41   42
+
+     vline left above hline in front:
+      11   12
+     |21   22
+     |31   32
+     +---- 42
+      51   52
+
+     vline right below hline in front:
+     11   12
+     ---+ 22
+     31 | 32
+     41   42
+
+     vline right above hline in front:
+     11   12
+     21 | 22
+     31 | 32
+     ---+ 42
+     51   52
+
+     vline left below hline in the middle:
+     11   12   13
+     21 +----- 23
+     31 | 32   33
+     41   42   43
+
+     vline left above hline in the middle:
+     11   12   13
+     21 | 22   23
+     31 | 32   33
+     41 +----- 43
+     51   52   53
+
+     vline right below hline in the middle:
+     11   12   13
+     21 -----+ 23
+     31   32 | 33
+     41   42   43
+
+     vline right above hline in the middle:
+     11   12   13
+     21   22 | 23
+     31   32 | 33
+     41 -----+ 43
+     51   52   53
+
+     vline below hline in the middle:
+     11   12   13   14
+     21 -----+----- 24
+     31   32 | 33   34
+     41   42   43   44
+
+     vline above hline in the middle:
+     11   12   13   14
+     21   22 | 23   24
+     31   32 | 33   34
+     41 -----+----- 44
+     51   52   53   54
+
+     vline left below hline at the end:
+     11   12
+     21 +----
+     31 | 32
+     41   42
+
+     vline left above hline at the end:
+     11   12
+     21 | 22
+     31 | 32
+     41 +----
+     51   52
+
+     vline right below hline at the end:
+     11   12
+     21 -----+
+     31   32 |
+     41   42
+
+     vline right above hline at the end:
+     11   12
+     21   22 |
+     31   32 |
+     41 -----+
+     51   52
+
+     vline left above hline bottom left:
+      11   12
+     |21   22
+     |31   32
+     +---- 42
+
+     vline right above hline bottom left:
+     11   12
+     21 | 22
+     31 | 32
+     ---+ 42
+
+     vline left above hline at the bottom:
+     11   12   13
+     21 | 22   23
+     31 | 32   33
+     41 +----- 43
+
+     vline right above hline at the bottom:
+     11   12   13
+     21   22 | 23
+     31   32 | 33
+     41 -----+ 43
+
+     vline above hline at the bottom:
+     11   12   13   14
+     21   22 | 23   24
+     31   32 | 33   34
+     41 -----+----- 44
+
+     vline left above hline bottom right:
+     11   12
+     21 | 22
+     31 | 32
+     41 +----
+
+     vline right above hline bottom right:
+     11   12
+     21   22 |
+     31   32 |
+     41 -----+
+
+     double vline left below hline top left:
+     +---- 12
+     |21   22
+      31   32
+
+     double vline right below hline top left:
+     ---+|12
+     21 ||22
+     31   32
+
+     double vline left below hline at the top:
+     11 ++---- 13
+     21 ||22   23
+     31   32   33
+
+     double vline right below hline at the top:
+     11 -----+|13
+     21   22 ||23
+     31   32   33
+
+     double vline below hline at the top:
+     11 -----++---- 14
+     21   22 ||23   24
+     31   32   33   34
+
+     double vline left below hline top right:
+     11 ++---
+     21 ||22
+     31   32
+
+     double vline right below hline top right:
+     11 -----+
+     21   22 |
+     31   32
+
+     double vline left below hline in front:
+      11   12
+     +---- 22
+     |31   32
+      41   42
+
+     double vline left above hline in front:
+      11   12
+     |21   22
+     |31   32
+     +---- 42
+      51   52
+
+     double vline right below hline in front:
+     11   12
+     ---+|22
+     31 ||32
+     41   42
+
+     double vline right above hline in front:
+     11   12
+     21 ||22
+     31 ||32
+     ---+|42
+     51   52
+
+     double vline left below hline in the middle:
+     11   12   13
+     21 ++---- 23
+     31 ||32   33
+     41   42   43
+
+     double vline left above hline in the middle:
+     11   12   13
+     21 ||22   23
+     31 ||32   33
+     41 ++---- 43
+     51   52   53
+
+     double vline right below hline in the middle:
+     11   12   13
+     21 -----+|23
+     31   32 ||33
+     41   42   43
+
+     double vline right above hline in the middle:
+     11   12   13
+     21   22 ||23
+     31   32 ||33
+     41 -----+|43
+     51   52   53
+
+     double vline below hline in the middle:
+     11   12   13   14
+     21 -----++---- 24
+     31   32 ||33   34
+     41   42   43   44
+
+     double vline above hline in the middle:
+     11   12   13   14
+     21   22 ||23   24
+     31   32 ||33   34
+     41 -----++---- 44
+     51   52   53   54
+
+     double vline left below hline at the end:
+     11   12
+     21 ++---
+     31 ||32
+     41   42
+
+     double vline left above hline at the end:
+     11   12
+     21 ||22
+     31 ||32
+     41 ++---
+     51   52
+
+     double vline right below hline at the end:
+     11   12
+     21 -----+
+     31   32 |
+     41   42
+
+     double vline right above hline at the end:
+     11   12
+     21   22 |
+     31   32 |
+     41 -----+
+     51   52
+
+     double vline left above hline bottom left:
+      11   12
+     |21   22
+     |31   32
+     +---- 42
+
+     double vline right above hline bottom left:
+     11   12
+     21 ||22
+     31 ||32
+     ---+|42
+
+     double vline left above hline at the bottom:
+     11   12   13
+     21 ||22   23
+     31 ||32   33
+     41 ++---- 43
+
+     double vline right above hline at the bottom:
+     11   12   13
+     21   22 ||23
+     31   32 ||33
+     41 -----+|43
+
+     double vline above hline at the bottom:
+     11   12   13   14
+     21   22 ||23   24
+     31   32 ||33   34
+     41 -----++---- 44
+
+     double vline left above hline bottom right:
+     11   12
+     21 ||22
+     31 ||32
+     41 ++---
+
+     double vline right above hline bottom right:
+     11   12
+     21   22 |
+     31   32 |
+     41 -----+
+
+BBOOXXEEDD
+     vline top left:
+     +--------+
+     |11   12 |
+     |21   22 |
+     +--------+
+     hline and vline top left:
+     +---+----+
+     +---+ 12 |
+     |21   22 |
+     +--------+
+     vline and hline top left:
+     +--------+
+     +---- 12 |
+     |21   22 |
+     +--------+
+     vline top:
+     +---+----+
+     |11 | 12 |
+     |21   22 |
+     +--------+
+     vline and hline top:
+     +---+---------+
+     |11 +----- 13 |
+     |21   22   23 |
+     +-------------+
+     hline and vline top:
+     +--------+----+
+     |11 -----+ 13 |
+     |21   22   23 |
+     +-------------+
+     hline, vline, hline top:
+     +--------+---------+
+     |11 -----+----- 13 |
+     |21   22   23   24 |
+     +------------------+
+     vline top right:
+     +--------+
+     |11   12 |
+     |21   22 |
+     +--------+
+     vline and hline top right:
+     +---+----+
+     |11 +----+
+     |21   22 |
+     +--------+
+     hline and vline top right:
+     +--------+
+     |11 -----+
+     |21   22 |
+     +--------+
+     double vline top left:
+     +--------+
+     |11   12 |
+     |21   22 |
+     +--------+
+     hline and double vline top left:
+     +---++---+
+     +---+|12 |
+     |21   22 |
+     +--------+
+     double vline and hline top left:
+     +--------+
+     +---- 12 |
+     |21   22 |
+     +--------+
+     double vline top:
+     +---++---+
+     |11 ||12 |
+     |21   22 |
+     +--------+
+     double vline and hline top:
+     +---++--------+
+     |11 ++---- 13 |
+     |21   22   23 |
+     +-------------+
+     hline and double vline top:
+     +--------++---+
+     |11 -----+|13 |
+     |21   22   23 |
+     +-------------+
+     hline, double vline, hline top:
+     +--------++--------+
+     |11 -----++---- 13 |
+     |21   22   23   24 |
+     +------------------+
+     double vline top right:
+     +--------+
+     |11   12 |
+     |21   22 |
+     +--------+
+     double vline and hline top right:
+     +---++---+
+     |11 ++---+
+     |21   22 |
+     +--------+
+     hline and double vline top right:
+     +--------+
+     |11 -----+
+     |21   22 |
+     +--------+
+     hline top left:
+     +--------+
+     +---- 12 |
+     |21   22 |
+     +--------+
+     hline top:
+     +-------------+
+     |11 ------ 13 |
+     |21   22   23 |
+     +-------------+
+     double hline top:
+     +------------------+
+     |11 ----------- 13 |
+     |21   22   23   24 |
+     +------------------+
+     hline top right:
+     +--------+
+     |11 -----+
+     |21   22 |
+     +--------+
+     hline in front:
+     +--------+
+     |11   12 |
+     +---- 22 |
+     |31   32 |
+     +--------+
+     vline in front:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     hline and vline in front:
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     +---+ 32 |
+     |41   42 |
+     +--------+
+     vline and hline in front:
+     +--------+
+     |11   12 |
+     |21   22 |
+     +---- 32 |
+     |41   42 |
+     +--------+
+     hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 ------ 23 |
+     |31   32   33 |
+     +-------------+
+     vline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 | 22   23 |
+     |31 | 32   33 |
+     |41   42   43 |
+     +-------------+
+     vline and hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 | 22   23 |
+     |31 +----- 33 |
+     |41   42   43 |
+     +-------------+
+     hline and vline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21   22 | 23 |
+     |31 -----+ 33 |
+     |41   42   43 |
+     +-------------+
+     double hline in the middle:
+     +------------------+
+     |11   12   13   14 |
+     |21 ----------- 24 |
+     |31   32   33   34 |
+     +------------------+
+     hline, vline, hline in the middle:
+     +------------------+
+     |11   12   13   14 |
+     |21   22 | 23   24 |
+     |31 -----+----- 34 |
+     |41   42   43   44 |
+     +------------------+
+     hline at the end:
+     +--------+
+     |11   12 |
+     |21 -----+
+     |31   32 |
+     +--------+
+     vline at the end:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     vline and hline at the end:
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 +----+
+     |41   42 |
+     +--------+
+     hline and vline at the end:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31 -----+
+     |41   42 |
+     +--------+
+     hline bottom left:
+     +--------+
+     |11   12 |
+     +---- 22 |
+     +--------+
+     vline bottom left:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     hline and vline bottom left:
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     +---+ 32 |
+     +---+----+
+     vline and hline bottom left:
+     +--------+
+     |11   12 |
+     |21   22 |
+     +---- 32 |
+     +--------+
+     double hline bottom:
+     +------------------+
+     |11   12   13   14 |
+     |21 ----------- 24 |
+     +------------------+
+     hline, vline, hline bottom:
+     +------------------+
+     |11   12   13   14 |
+     |21   22 | 23   24 |
+     |31 -----+----- 34 |
+     +--------+---------+
+     hline bottom right:
+     +--------+
+     |11   12 |
+     |21 -----+
+     +--------+
+     vline bottom right:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     vline and hline bottom right:
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 +----+
+     +---+----+
+     hline and vline bottom right:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31 -----+
+     +--------+
+     double vline in front:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     hline and double vline in front:
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     +---+|32 |
+     |41   42 |
+     +--------+
+     double vline and hline in front:
+     +--------+
+     |11   12 |
+     |21   22 |
+     +---- 32 |
+     |41   42 |
+     +--------+
+     double vline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 ||22   23 |
+     |31 ||32   33 |
+     |41   42   43 |
+     +-------------+
+     double vline and hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 ||22   23 |
+     |31 ++---- 33 |
+     |41   42   43 |
+     +-------------+
+     hline and doble vline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21   22 ||23 |
+     |31 -----+|33 |
+     |41   42   43 |
+     +-------------+
+     hline, double vline, hline in the middle:
+     +------------------+
+     |11   12   13   14 |
+     |21   22 ||23   24 |
+     |31 -----++---- 34 |
+     |41   42   43   44 |
+     +------------------+
+     double vline at the end:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     double vline and hline at the end:
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ++---+
+     |41   42 |
+     +--------+
+     hline and double vline at the end:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31 -----+
+     |41   42 |
+     +--------+
+     double vline bottom left:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     hline and double vline bottom left:
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     +---+|32 |
+     +---++---+
+     double vline and hline bottom left:
+     +--------+
+     |11   12 |
+     |21   22 |
+     +---- 32 |
+     +--------+
+     hline, double vline, hline bottom:
+     +------------------+
+     |11   12   13   14 |
+     |21   22 ||23   24 |
+     |31 -----++---- 34 |
+     +--------++--------+
+     double vline bottom right:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     double vline and hline bottom right:
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ++---+
+     +---++---+
+     hline and double vline bottom right:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31 -----+
+     +--------+
+     vline left below hline top left:
+     +--------+
+     +---- 12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     vline right below hline top left:
+     +--------+
+     +---+ 12 |
+     |21 | 22 |
+     |31   32 |
+     +--------+
+     vline left below hline at the top:
+     +-------------+
+     |11 +----- 13 |
+     |21 | 22   23 |
+     |31   32   33 |
+     +-------------+
+     vline right below hline at the top:
+     +-------------+
+     |11 -----+ 13 |
+     |21   22 | 23 |
+     |31   32   33 |
+     +-------------+
+     vline below hline at the top:
+     +------------------+
+     |11 -----+----- 14 |
+     |21   22 | 23   24 |
+     |31   32   33   34 |
+     +------------------+
+     vline left below hline top right:
+     +--------+
+     |11 +----+
+     |21 | 22 |
+     |31   32 |
+     +--------+
+     vline right below hline top right:
+     +--------+
+     |11 -----+
+     |21   22 |
+     |31   32 |
+     +--------+
+     vline left below hline in front:
+     +--------+
+     |11   12 |
+     +---- 22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     vline left above hline in front:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +---- 42 |
+     |51   52 |
+     +--------+
+     vline right below hline in front:
+     +--------+
+     |11   12 |
+     +---+ 22 |
+     |31 | 32 |
+     |41   42 |
+     +--------+
+     vline right above hline in front:
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 | 32 |
+     +---+ 42 |
+     |51   52 |
+     +--------+
+     vline left below hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 +----- 23 |
+     |31 | 32   33 |
+     |41   42   43 |
+     +-------------+
+     vline left above hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 | 22   23 |
+     |31 | 32   33 |
+     |41 +----- 43 |
+     |51   52   53 |
+     +-------------+
+     vline right below hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 -----+ 23 |
+     |31   32 | 33 |
+     |41   42   43 |
+     +-------------+
+     vline right above hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21   22 | 23 |
+     |31   32 | 33 |
+     |41 -----+ 43 |
+     |51   52   53 |
+     +-------------+
+     vline below hline in the middle:
+     +------------------+
+     |11   12   13   14 |
+     |21 -----+----- 24 |
+     |31   32 | 33   34 |
+     |41   42   43   44 |
+     +------------------+
+     vline above hline in the middle:
+     +------------------+
+     |11   12   13   14 |
+     |21   22 | 23   24 |
+     |31   32 | 33   34 |
+     |41 -----+----- 44 |
+     |51   52   53   54 |
+     +------------------+
+     vline left below hline at the end:
+     +--------+
+     |11   12 |
+     |21 +----+
+     |31 | 32 |
+     |41   42 |
+     +--------+
+     vline left above hline at the end:
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 | 32 |
+     |41 +----+
+     |51   52 |
+     +--------+
+     vline right below hline at the end:
+     +--------+
+     |11   12 |
+     |21 -----+
+     |31   32 |
+     |41   42 |
+     +--------+
+     vline right above hline at the end:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41 -----+
+     |51   52 |
+     +--------+
+     vline left above hline bottom left:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +---- 42 |
+     +--------+
+     vline right above hline bottom left:
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 | 32 |
+     +---+ 42 |
+     +--------+
+     vline left above hline at the bottom:
+     +-------------+
+     |11   12   13 |
+     |21 | 22   23 |
+     |31 | 32   33 |
+     |41 +----- 43 |
+     +-------------+
+     vline right above hline at the bottom:
+     +-------------+
+     |11   12   13 |
+     |21   22 | 23 |
+     |31   32 | 33 |
+     |41 -----+ 43 |
+     +-------------+
+     vline above hline at the bottom:
+     +------------------+
+     |11   12   13   14 |
+     |21   22 | 23   24 |
+     |31   32 | 33   34 |
+     |41 -----+----- 44 |
+     +------------------+
+     vline left above hline bottom right:
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 | 32 |
+     |41 +----+
+     +--------+
+     vline right above hline bottom right:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41 -----+
+     +--------+
+     double vline left below hline top left:
+     +--------+
+     +---- 12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     double vline right below hline top left:
+     +--------+
+     +---+|12 |
+     |21 ||22 |
+     |31   32 |
+     +--------+
+     double vline left below hline at the top:
+     +-------------+
+     |11 ++---- 13 |
+     |21 ||22   23 |
+     |31   32   33 |
+     +-------------+
+     double vline right below hline at the top:
+     +-------------+
+     |11 -----+|13 |
+     |21   22 ||23 |
+     |31   32   33 |
+     +-------------+
+     double vline below hline at the top:
+     +------------------+
+     |11 -----++---- 14 |
+     |21   22 ||23   24 |
+     |31   32   33   34 |
+     +------------------+
+     double vline left below hline top right:
+     +--------+
+     |11 ++---+
+     |21 ||22 |
+     |31   32 |
+     +--------+
+     double vline right below hline top right:
+     +--------+
+     |11 -----+
+     |21   22 |
+     |31   32 |
+     +--------+
+     double vline left below hline in front:
+     +--------+
+     |11   12 |
+     +---- 22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     double vline left above hline in front:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +---- 42 |
+     |51   52 |
+     +--------+
+     double vline right below hline in front:
+     +--------+
+     |11   12 |
+     +---+|22 |
+     |31 ||32 |
+     |41   42 |
+     +--------+
+     double vline right above hline in front:
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ||32 |
+     +---+|42 |
+     |51   52 |
+     +--------+
+     double vline left below hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 ++---- 23 |
+     |31 ||32   33 |
+     |41   42   43 |
+     +-------------+
+     double vline left above hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 ||22   23 |
+     |31 ||32   33 |
+     |41 ++---- 43 |
+     |51   52   53 |
+     +-------------+
+     double vline right below hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21 -----+|23 |
+     |31   32 ||33 |
+     |41   42   43 |
+     +-------------+
+     double vline right above hline in the middle:
+     +-------------+
+     |11   12   13 |
+     |21   22 ||23 |
+     |31   32 ||33 |
+     |41 -----+|43 |
+     |51   52   53 |
+     +-------------+
+     double vline below hline in the middle:
+     +------------------+
+     |11   12   13   14 |
+     |21 -----++---- 24 |
+     |31   32 ||33   34 |
+     |41   42   43   44 |
+     +------------------+
+     double vline above hline in the middle:
+     +------------------+
+     |11   12   13   14 |
+     |21   22 ||23   24 |
+     |31   32 ||33   34 |
+     |41 -----++---- 44 |
+     |51   52   53   54 |
+     +------------------+
+     double vline left below hline at the end:
+     +--------+
+     |11   12 |
+     |21 ++---+
+     |31 ||32 |
+     |41   42 |
+     +--------+
+     double vline left above hline at the end:
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ||32 |
+     |41 ++---+
+     |51   52 |
+     +--------+
+     double vline right below hline at the end:
+     +--------+
+     |11   12 |
+     |21 -----+
+     |31   32 |
+     |41   42 |
+     +--------+
+     double vline right above hline at the end:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41 -----+
+     |51   52 |
+     +--------+
+     double vline left above hline bottom left:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +---- 42 |
+     +--------+
+     double vline right above hline bottom left:
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ||32 |
+     +---+|42 |
+     +--------+
+     double vline left above hline at the bottom:
+     +-------------+
+     |11   12   13 |
+     |21 ||22   23 |
+     |31 ||32   33 |
+     |41 ++---- 43 |
+     +-------------+
+     double vline right above hline at the bottom:
+     +-------------+
+     |11   12   13 |
+     |21   22 ||23 |
+     |31   32 ||33 |
+     |41 -----+|43 |
+     +-------------+
+     double vline above hline at the bottom:
+     +------------------+
+     |11   12   13   14 |
+     |21   22 ||23   24 |
+     |31   32 ||33   34 |
+     |41 -----++---- 44 |
+     +------------------+
+     double vline left above hline bottom right:
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ||32 |
+     |41 ++---+
+     +--------+
+     double vline right above hline bottom right:
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41 -----+
+     +--------+
+
+AALLLLBBOOXX
+     vline top left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     hline and vline top left:
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     vline and hline top left:
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     vline top:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     vline and hline top:
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     hline and vline top:
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     hline, vline, hline top:
+     +---+----+----+----+
+     |11 +----+----+ 13 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     vline top right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     vline and hline top right:
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     hline and vline top right:
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     double vline top left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     hline and double vline top left:
+     +---++---+
+     +---+|12 |
+     +---++---+
+     |21 | 22 |
+     +---+----+
+     double vline and hline top left:
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     double vline top:
+     +---++---+
+     |11 ||12 |
+     +---++---+
+     |21 | 22 |
+     +---+----+
+     double vline and hline top:
+     +---++---+----+
+     |11 ++---+ 13 |
+     +---++---+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     hline and double vline top:
+     +---+----++---+
+     |11 +----+|13 |
+     +---+----++---+
+     |21 | 22 | 23 |
+     +---+----+----+
+     hline, double vline, hline top:
+     +---+----++---+----+
+     |11 +----++---+ 13 |
+     +---+----++---+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     double vline top right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     double vline and hline top right:
+     +---++---+
+     |11 ++---+
+     +---++---+
+     |21 | 22 |
+     +---+----+
+     hline and double vline top right:
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     hline top left:
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     hline top:
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     double hline top:
+     +---+----+----+----+
+     |11 +----+----+ 13 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     hline top right:
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     vline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     hline and vline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     vline and hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     vline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     vline and hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 +----+ 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     hline and vline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 +----+ 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     double hline in the middle:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 +----+----+ 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     hline, vline, hline in the middle:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 +----+----+ 34 |
+     +---+----+----+----+
+     |41 | 42 | 43 | 44 |
+     +---+----+----+----+
+     hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     vline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     vline and hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     hline and vline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     hline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     vline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     hline and vline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     vline and hline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     double hline bottom:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 +----+----+ 24 |
+     +---+----+----+----+
+     hline, vline, hline bottom:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 +----+----+ 34 |
+     +---+----+----+----+
+     hline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     vline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     vline and hline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     hline and vline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     double vline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     hline and double vline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     +---+|32 |
+     +---++---+
+     |41 | 42 |
+     +---+----+
+     double vline and hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     double vline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---++---+----+
+     |31 ||32 | 33 |
+     +---++---+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     double vline and hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---++---+----+
+     |31 ++---+ 33 |
+     +---++---+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     hline and doble vline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----++---+
+     |31 +----+|33 |
+     +---+----++---+
+     |41 | 42 | 43 |
+     +---+----+----+
+     hline, double vline, hline in the middle:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----++---+----+
+     |31 +----++---+ 34 |
+     +---+----++---+----+
+     |41 | 42 | 43 | 44 |
+     +---+----+----+----+
+     double vline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     double vline and hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ++---+
+     +---++---+
+     |41 | 42 |
+     +---+----+
+     hline and double vline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     double vline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     hline and double vline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     +---+|32 |
+     +---++---+
+     double vline and hline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     hline, double vline, hline bottom:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----++---+----+
+     |31 +----++---+ 34 |
+     +---+----++---+----+
+     double vline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     double vline and hline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ++---+
+     +---++---+
+     hline and double vline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     vline left below hline top left:
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     vline right below hline top left:
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     vline left below hline at the top:
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     vline right below hline at the top:
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     vline below hline at the top:
+     +---+----+----+----+
+     |11 +----+----+ 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     vline left below hline top right:
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     vline right below hline top right:
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     vline left below hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     vline left above hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     vline right below hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     vline right above hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     vline left below hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     vline left above hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 +----+ 43 |
+     +---+----+----+
+     |51 | 52 | 53 |
+     +---+----+----+
+     vline right below hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     vline right above hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 +----+ 43 |
+     +---+----+----+
+     |51 | 52 | 53 |
+     +---+----+----+
+     vline below hline in the middle:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 +----+----+ 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     |41 | 42 | 43 | 44 |
+     +---+----+----+----+
+     vline above hline in the middle:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     |41 +----+----+ 44 |
+     +---+----+----+----+
+     |51 | 52 | 53 | 54 |
+     +---+----+----+----+
+     vline left below hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     vline left above hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     vline right below hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     vline right above hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     vline left above hline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     vline right above hline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     vline left above hline at the bottom:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 +----+ 43 |
+     +---+----+----+
+     vline right above hline at the bottom:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 +----+ 43 |
+     +---+----+----+
+     vline above hline at the bottom:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     |41 +----+----+ 44 |
+     +---+----+----+----+
+     vline left above hline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     vline right above hline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     double vline left below hline top left:
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     double vline right below hline top left:
+     +---+----+
+     +---+ 12 |
+     +---++---+
+     |21 ||22 |
+     +---++---+
+     |31 | 32 |
+     +---+----+
+     double vline left below hline at the top:
+     +---+----+----+
+     |11 +----+ 13 |
+     +---++---+----+
+     |21 ||22 | 23 |
+     +---++---+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     double vline right below hline at the top:
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----++---+
+     |21 | 22 ||23 |
+     +---+----++---+
+     |31 | 32 | 33 |
+     +---+----+----+
+     double vline below hline at the top:
+     +---+----+----+----+
+     |11 +----+----+ 14 |
+     +---+----++---+----+
+     |21 | 22 ||23 | 24 |
+     +---+----++---+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     double vline left below hline top right:
+     +---+----+
+     |11 +----+
+     +---++---+
+     |21 ||22 |
+     +---++---+
+     |31 | 32 |
+     +---+----+
+     double vline right below hline top right:
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     double vline left below hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     double vline left above hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     double vline right below hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     |41 | 42 |
+     +---+----+
+     double vline right above hline in front:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     +---+|42 |
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     double vline left below hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---++---+----+
+     |31 ||32 | 33 |
+     +---++---+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     double vline left above hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---++---+----+
+     |31 ||32 | 33 |
+     +---++---+----+
+     |41 ++---+ 43 |
+     +---+----+----+
+     |51 | 52 | 53 |
+     +---+----+----+
+     double vline right below hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---+----++---+
+     |31 | 32 ||33 |
+     +---+----++---+
+     |41 | 42 | 43 |
+     +---+----+----+
+     double vline right above hline in the middle:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----++---+
+     |31 | 32 ||33 |
+     +---+----++---+
+     |41 +----+|43 |
+     +---+----+----+
+     |51 | 52 | 53 |
+     +---+----+----+
+     double vline below hline in the middle:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 +----+----+ 24 |
+     +---+----++---+----+
+     |31 | 32 ||33 | 34 |
+     +---+----++---+----+
+     |41 | 42 | 43 | 44 |
+     +---+----+----+----+
+     double vline above hline in the middle:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----++---+----+
+     |31 | 32 ||33 | 34 |
+     +---+----++---+----+
+     |41 +----++---+ 44 |
+     +---+----+----+----+
+     |51 | 52 | 53 | 54 |
+     +---+----+----+----+
+     double vline left below hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     |41 | 42 |
+     +---+----+
+     double vline left above hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     |41 ++---+
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     double vline right below hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     double vline right above hline at the end:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     double vline left above hline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     double vline right above hline bottom left:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     +---+|42 |
+     +---+----+
+     double vline left above hline at the bottom:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---++---+----+
+     |31 ||32 | 33 |
+     +---++---+----+
+     |41 ++---+ 43 |
+     +---+----+----+
+     double vline right above hline at the bottom:
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----++---+
+     |31 | 32 ||33 |
+     +---+----++---+
+     |41 +----+|43 |
+     +---+----+----+
+     double vline above hline at the bottom:
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----++---+----+
+     |31 | 32 ||33 | 34 |
+     +---+----++---+----+
+     |41 +----++---+ 44 |
+     +---+----+----+----+
+     double vline left above hline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     |41 ++---+
+     +---+----+
+     double vline right above hline bottom right:
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+
+DDOOUUBBLLEEBBOOXX
+     vline top left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     +--------+
+     +--------+
+     hline and vline top left:
+     +--------+
+     +---+----+
+     +---+ 12 |
+     |21   22 |
+     +--------+
+     +--------+
+     vline and hline top left:
+     +--------+
+     +--------+
+     +---- 12 |
+     |21   22 |
+     +--------+
+     +--------+
+     vline top:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     |21   22 |
+     +--------+
+     +--------+
+     vline and hline top:
+     +-------------+
+     +---+---------+
+     |11 +----- 13 |
+     |21   22   23 |
+     +-------------+
+     +-------------+
+     hline and vline top:
+     +-------------+
+     +--------+----+
+     |11 -----+ 13 |
+     |21   22   23 |
+     +-------------+
+     +-------------+
+     hline, vline, hline top:
+     +------------------+
+     +--------+---------+
+     |11 -----+----- 13 |
+     |21   22   23   24 |
+     +------------------+
+     +------------------+
+     vline top right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     +--------+
+     +--------+
+     vline and hline top right:
+     +--------+
+     +---+----+
+     |11 +----+
+     |21   22 |
+     +--------+
+     +--------+
+     hline and vline top right:
+     +--------+
+     +--------+
+     |11 -----+
+     |21   22 |
+     +--------+
+     +--------+
+     double vline top left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     +--------+
+     +--------+
+     hline and double vline top left:
+     +--------+
+     +---++---+
+     +---+|12 |
+     |21   22 |
+     +--------+
+     +--------+
+     double vline and hline top left:
+     +--------+
+     +--------+
+     +---- 12 |
+     |21   22 |
+     +--------+
+     +--------+
+     double vline top:
+     +--------+
+     +---++---+
+     |11 ||12 |
+     |21   22 |
+     +--------+
+     +--------+
+     double vline and hline top:
+     +-------------+
+     +---++--------+
+     |11 ++---- 13 |
+     |21   22   23 |
+     +-------------+
+     +-------------+
+     hline and double vline top:
+     +-------------+
+     +--------++---+
+     |11 -----+|13 |
+     |21   22   23 |
+     +-------------+
+     +-------------+
+     hline, double vline, hline top:
+     +------------------+
+     +--------++--------+
+     |11 -----++---- 13 |
+     |21   22   23   24 |
+     +------------------+
+     +------------------+
+     double vline top right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     +--------+
+     +--------+
+     double vline and hline top right:
+     +--------+
+     +---++---+
+     |11 ++---+
+     |21   22 |
+     +--------+
+     +--------+
+     hline and double vline top right:
+     +--------+
+     +--------+
+     |11 -----+
+     |21   22 |
+     +--------+
+     +--------+
+     hline top left:
+     +--------+
+     +--------+
+     +---- 12 |
+     |21   22 |
+     +--------+
+     +--------+
+     hline top:
+     +-------------+
+     +-------------+
+     |11 ------ 13 |
+     |21   22   23 |
+     +-------------+
+     +-------------+
+     double hline top:
+     +------------------+
+     +------------------+
+     |11 ----------- 13 |
+     |21   22   23   24 |
+     +------------------+
+     +------------------+
+     hline top right:
+     +--------+
+     +--------+
+     |11 -----+
+     |21   22 |
+     +--------+
+     +--------+
+     hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     +---- 22 |
+     |31   32 |
+     +--------+
+     +--------+
+     vline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     +--------+
+     hline and vline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     +---+ 32 |
+     |41   42 |
+     +--------+
+     +--------+
+     vline and hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     +---- 32 |
+     |41   42 |
+     +--------+
+     +--------+
+     hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 ------ 23 |
+     |31   32   33 |
+     +-------------+
+     +-------------+
+     vline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 | 22   23 |
+     |31 | 32   33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     vline and hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 | 22   23 |
+     |31 +----- 33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     hline and vline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21   22 | 23 |
+     |31 -----+ 33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     double hline in the middle:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21 ----------- 24 |
+     |31   32   33   34 |
+     +------------------+
+     +------------------+
+     hline, vline, hline in the middle:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21   22 | 23   24 |
+     |31 -----+----- 34 |
+     |41   42   43   44 |
+     +------------------+
+     +------------------+
+     hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 -----+
+     |31   32 |
+     +--------+
+     +--------+
+     vline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     +--------+
+     vline and hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 +----+
+     |41   42 |
+     +--------+
+     +--------+
+     hline and vline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31 -----+
+     |41   42 |
+     +--------+
+     +--------+
+     hline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     +---- 22 |
+     +--------+
+     +--------+
+     vline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     +--------+
+     hline and vline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     +---+ 32 |
+     +---+----+
+     +--------+
+     vline and hline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     +---- 32 |
+     +--------+
+     +--------+
+     double hline bottom:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21 ----------- 24 |
+     +------------------+
+     +------------------+
+     hline, vline, hline bottom:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21   22 | 23   24 |
+     |31 -----+----- 34 |
+     +--------+---------+
+     +------------------+
+     hline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 -----+
+     +--------+
+     +--------+
+     vline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     +--------+
+     vline and hline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 +----+
+     +---+----+
+     +--------+
+     hline and vline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31 -----+
+     +--------+
+     +--------+
+     double vline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     +--------+
+     hline and double vline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     +---+|32 |
+     |41   42 |
+     +--------+
+     +--------+
+     double vline and hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     +---- 32 |
+     |41   42 |
+     +--------+
+     +--------+
+     double vline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 ||22   23 |
+     |31 ||32   33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     double vline and hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 ||22   23 |
+     |31 ++---- 33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     hline and doble vline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21   22 ||23 |
+     |31 -----+|33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     hline, double vline, hline in the middle:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21   22 ||23   24 |
+     |31 -----++---- 34 |
+     |41   42   43   44 |
+     +------------------+
+     +------------------+
+     double vline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     +--------+
+     double vline and hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ++---+
+     |41   42 |
+     +--------+
+     +--------+
+     hline and double vline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31 -----+
+     |41   42 |
+     +--------+
+     +--------+
+     double vline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     +--------+
+     hline and double vline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     +---+|32 |
+     +---++---+
+     +--------+
+     double vline and hline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     +---- 32 |
+     +--------+
+     +--------+
+     hline, double vline, hline bottom:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21   22 ||23   24 |
+     |31 -----++---- 34 |
+     +--------++--------+
+     +------------------+
+     double vline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     +--------+
+     double vline and hline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ++---+
+     +---++---+
+     +--------+
+     hline and double vline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31 -----+
+     +--------+
+     +--------+
+     vline left below hline top left:
+     +--------+
+     +--------+
+     +---- 12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     +--------+
+     vline right below hline top left:
+     +--------+
+     +--------+
+     +---+ 12 |
+     |21 | 22 |
+     |31   32 |
+     +--------+
+     +--------+
+     vline left below hline at the top:
+     +-------------+
+     +-------------+
+     |11 +----- 13 |
+     |21 | 22   23 |
+     |31   32   33 |
+     +-------------+
+     +-------------+
+     vline right below hline at the top:
+     +-------------+
+     +-------------+
+     |11 -----+ 13 |
+     |21   22 | 23 |
+     |31   32   33 |
+     +-------------+
+     +-------------+
+     vline below hline at the top:
+     +------------------+
+     +------------------+
+     |11 -----+----- 14 |
+     |21   22 | 23   24 |
+     |31   32   33   34 |
+     +------------------+
+     +------------------+
+     vline left below hline top right:
+     +--------+
+     +--------+
+     |11 +----+
+     |21 | 22 |
+     |31   32 |
+     +--------+
+     +--------+
+     vline right below hline top right:
+     +--------+
+     +--------+
+     |11 -----+
+     |21   22 |
+     |31   32 |
+     +--------+
+     +--------+
+     vline left below hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     +---- 22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     +--------+
+     vline left above hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +---- 42 |
+     |51   52 |
+     +--------+
+     +--------+
+     vline right below hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     +---+ 22 |
+     |31 | 32 |
+     |41   42 |
+     +--------+
+     +--------+
+     vline right above hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 | 32 |
+     +---+ 42 |
+     |51   52 |
+     +--------+
+     +--------+
+     vline left below hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 +----- 23 |
+     |31 | 32   33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     vline left above hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 | 22   23 |
+     |31 | 32   33 |
+     |41 +----- 43 |
+     |51   52   53 |
+     +-------------+
+     +-------------+
+     vline right below hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 -----+ 23 |
+     |31   32 | 33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     vline right above hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21   22 | 23 |
+     |31   32 | 33 |
+     |41 -----+ 43 |
+     |51   52   53 |
+     +-------------+
+     +-------------+
+     vline below hline in the middle:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21 -----+----- 24 |
+     |31   32 | 33   34 |
+     |41   42   43   44 |
+     +------------------+
+     +------------------+
+     vline above hline in the middle:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21   22 | 23   24 |
+     |31   32 | 33   34 |
+     |41 -----+----- 44 |
+     |51   52   53   54 |
+     +------------------+
+     +------------------+
+     vline left below hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 +----+
+     |31 | 32 |
+     |41   42 |
+     +--------+
+     +--------+
+     vline left above hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 | 32 |
+     |41 +----+
+     |51   52 |
+     +--------+
+     +--------+
+     vline right below hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 -----+
+     |31   32 |
+     |41   42 |
+     +--------+
+     +--------+
+     vline right above hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41 -----+
+     |51   52 |
+     +--------+
+     +--------+
+     vline left above hline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +---- 42 |
+     +--------+
+     +--------+
+     vline right above hline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 | 32 |
+     +---+ 42 |
+     +--------+
+     +--------+
+     vline left above hline at the bottom:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 | 22   23 |
+     |31 | 32   33 |
+     |41 +----- 43 |
+     +-------------+
+     +-------------+
+     vline right above hline at the bottom:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21   22 | 23 |
+     |31   32 | 33 |
+     |41 -----+ 43 |
+     +-------------+
+     +-------------+
+     vline above hline at the bottom:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21   22 | 23   24 |
+     |31   32 | 33   34 |
+     |41 -----+----- 44 |
+     +------------------+
+     +------------------+
+     vline left above hline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 | 22 |
+     |31 | 32 |
+     |41 +----+
+     +--------+
+     +--------+
+     vline right above hline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41 -----+
+     +--------+
+     +--------+
+     double vline left below hline top left:
+     +--------+
+     +--------+
+     +---- 12 |
+     |21   22 |
+     |31   32 |
+     +--------+
+     +--------+
+     double vline right below hline top left:
+     +--------+
+     +--------+
+     +---+|12 |
+     |21 ||22 |
+     |31   32 |
+     +--------+
+     +--------+
+     double vline left below hline at the top:
+     +-------------+
+     +-------------+
+     |11 ++---- 13 |
+     |21 ||22   23 |
+     |31   32   33 |
+     +-------------+
+     +-------------+
+     double vline right below hline at the top:
+     +-------------+
+     +-------------+
+     |11 -----+|13 |
+     |21   22 ||23 |
+     |31   32   33 |
+     +-------------+
+     +-------------+
+     double vline below hline at the top:
+     +------------------+
+     +------------------+
+     |11 -----++---- 14 |
+     |21   22 ||23   24 |
+     |31   32   33   34 |
+     +------------------+
+     +------------------+
+     double vline left below hline top right:
+     +--------+
+     +--------+
+     |11 ++---+
+     |21 ||22 |
+     |31   32 |
+     +--------+
+     +--------+
+     double vline right below hline top right:
+     +--------+
+     +--------+
+     |11 -----+
+     |21   22 |
+     |31   32 |
+     +--------+
+     +--------+
+     double vline left below hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     +---- 22 |
+     |31   32 |
+     |41   42 |
+     +--------+
+     +--------+
+     double vline left above hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +---- 42 |
+     |51   52 |
+     +--------+
+     +--------+
+     double vline right below hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     +---+|22 |
+     |31 ||32 |
+     |41   42 |
+     +--------+
+     +--------+
+     double vline right above hline in front:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ||32 |
+     +---+|42 |
+     |51   52 |
+     +--------+
+     +--------+
+     double vline left below hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 ++---- 23 |
+     |31 ||32   33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     double vline left above hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 ||22   23 |
+     |31 ||32   33 |
+     |41 ++---- 43 |
+     |51   52   53 |
+     +-------------+
+     +-------------+
+     double vline right below hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 -----+|23 |
+     |31   32 ||33 |
+     |41   42   43 |
+     +-------------+
+     +-------------+
+     double vline right above hline in the middle:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21   22 ||23 |
+     |31   32 ||33 |
+     |41 -----+|43 |
+     |51   52   53 |
+     +-------------+
+     +-------------+
+     double vline below hline in the middle:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21 -----++---- 24 |
+     |31   32 ||33   34 |
+     |41   42   43   44 |
+     +------------------+
+     +------------------+
+     double vline above hline in the middle:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21   22 ||23   24 |
+     |31   32 ||33   34 |
+     |41 -----++---- 44 |
+     |51   52   53   54 |
+     +------------------+
+     +------------------+
+     double vline left below hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 ++---+
+     |31 ||32 |
+     |41   42 |
+     +--------+
+     +--------+
+     double vline left above hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ||32 |
+     |41 ++---+
+     |51   52 |
+     +--------+
+     +--------+
+     double vline right below hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 -----+
+     |31   32 |
+     |41   42 |
+     +--------+
+     +--------+
+     double vline right above hline at the end:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41 -----+
+     |51   52 |
+     +--------+
+     +--------+
+     double vline left above hline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     +---- 42 |
+     +--------+
+     +--------+
+     double vline right above hline bottom left:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ||32 |
+     +---+|42 |
+     +--------+
+     +--------+
+     double vline left above hline at the bottom:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21 ||22   23 |
+     |31 ||32   33 |
+     |41 ++---- 43 |
+     +-------------+
+     +-------------+
+     double vline right above hline at the bottom:
+     +-------------+
+     +-------------+
+     |11   12   13 |
+     |21   22 ||23 |
+     |31   32 ||33 |
+     |41 -----+|43 |
+     +-------------+
+     +-------------+
+     double vline above hline at the bottom:
+     +------------------+
+     +------------------+
+     |11   12   13   14 |
+     |21   22 ||23   24 |
+     |31   32 ||33   34 |
+     |41 -----++---- 44 |
+     +------------------+
+     +------------------+
+     double vline left above hline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21 ||22 |
+     |31 ||32 |
+     |41 ++---+
+     +--------+
+     +--------+
+     double vline right above hline bottom right:
+     +--------+
+     +--------+
+     |11   12 |
+     |21   22 |
+     |31   32 |
+     |41 -----+
+     +--------+
+     +--------+
+
+DDOOUUBBLLEEBBOOXX AALLLLBBOOXX
+     vline top left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     hline and vline top left:
+     +--------+
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     vline and hline top left:
+     +--------+
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     vline top:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     vline and hline top:
+     +-------------+
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     +-------------+
+     hline and vline top:
+     +-------------+
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     +-------------+
+     hline, vline, hline top:
+     +------------------+
+     +---+----+----+----+
+     |11 +----+----+ 13 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     +------------------+
+     vline top right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     vline and hline top right:
+     +--------+
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     hline and vline top right:
+     +--------+
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     double vline top left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     hline and double vline top left:
+     +--------+
+     +---++---+
+     +---+|12 |
+     +---++---+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     double vline and hline top left:
+     +--------+
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     double vline top:
+     +--------+
+     +---++---+
+     |11 ||12 |
+     +---++---+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     double vline and hline top:
+     +-------------+
+     +---++---+----+
+     |11 ++---+ 13 |
+     +---++---+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     +-------------+
+     hline and double vline top:
+     +-------------+
+     +---+----++---+
+     |11 +----+|13 |
+     +---+----++---+
+     |21 | 22 | 23 |
+     +---+----+----+
+     +-------------+
+     hline, double vline, hline top:
+     +------------------+
+     +---+----++---+----+
+     |11 +----++---+ 13 |
+     +---+----++---+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     +------------------+
+     double vline top right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     double vline and hline top right:
+     +--------+
+     +---++---+
+     |11 ++---+
+     +---++---+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     hline and double vline top right:
+     +--------+
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     hline top left:
+     +--------+
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     hline top:
+     +-------------+
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     +-------------+
+     double hline top:
+     +------------------+
+     +---+----+----+----+
+     |11 +----+----+ 13 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     +------------------+
+     hline top right:
+     +--------+
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +--------+
+     hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     vline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     hline and vline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     vline and hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     +-------------+
+     vline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     vline and hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 +----+ 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     hline and vline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 +----+ 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     double hline in the middle:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 +----+----+ 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     +------------------+
+     hline, vline, hline in the middle:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 +----+----+ 34 |
+     +---+----+----+----+
+     |41 | 42 | 43 | 44 |
+     +---+----+----+----+
+     +------------------+
+     hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     vline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     vline and hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     hline and vline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     hline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     +--------+
+     vline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     hline and vline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     +--------+
+     vline and hline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     +--------+
+     double hline bottom:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 +----+----+ 24 |
+     +---+----+----+----+
+     +------------------+
+     hline, vline, hline bottom:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 +----+----+ 34 |
+     +---+----+----+----+
+     +------------------+
+     hline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     +--------+
+     vline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     vline and hline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     +--------+
+     hline and vline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     +--------+
+     double vline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     hline and double vline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     +---+|32 |
+     +---++---+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     double vline and hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     double vline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---++---+----+
+     |31 ||32 | 33 |
+     +---++---+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     double vline and hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---++---+----+
+     |31 ++---+ 33 |
+     +---++---+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     hline and doble vline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----++---+
+     |31 +----+|33 |
+     +---+----++---+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     hline, double vline, hline in the middle:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----++---+----+
+     |31 +----++---+ 34 |
+     +---+----++---+----+
+     |41 | 42 | 43 | 44 |
+     +---+----+----+----+
+     +------------------+
+     double vline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     double vline and hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ++---+
+     +---++---+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     hline and double vline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     double vline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     hline and double vline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     +---+|32 |
+     +---++---+
+     +--------+
+     double vline and hline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     +---+ 32 |
+     +---+----+
+     +--------+
+     hline, double vline, hline bottom:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----++---+----+
+     |31 +----++---+ 34 |
+     +---+----++---+----+
+     +------------------+
+     double vline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     double vline and hline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ++---+
+     +---++---+
+     +--------+
+     hline and double vline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 +----+
+     +---+----+
+     +--------+
+     vline left below hline top left:
+     +--------+
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     vline right below hline top left:
+     +--------+
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     vline left below hline at the top:
+     +-------------+
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     +-------------+
+     vline right below hline at the top:
+     +-------------+
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     +-------------+
+     vline below hline at the top:
+     +------------------+
+     +---+----+----+----+
+     |11 +----+----+ 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     +------------------+
+     vline left below hline top right:
+     +--------+
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     vline right below hline top right:
+     +--------+
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     vline left below hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     vline left above hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     +--------+
+     vline right below hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     vline right above hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     +--------+
+     vline left below hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     vline left above hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 +----+ 43 |
+     +---+----+----+
+     |51 | 52 | 53 |
+     +---+----+----+
+     +-------------+
+     vline right below hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     vline right above hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 +----+ 43 |
+     +---+----+----+
+     |51 | 52 | 53 |
+     +---+----+----+
+     +-------------+
+     vline below hline in the middle:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 +----+----+ 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     |41 | 42 | 43 | 44 |
+     +---+----+----+----+
+     +------------------+
+     vline above hline in the middle:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     |41 +----+----+ 44 |
+     +---+----+----+----+
+     |51 | 52 | 53 | 54 |
+     +---+----+----+----+
+     +------------------+
+     vline left below hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     vline left above hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     +--------+
+     vline right below hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     vline right above hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     +--------+
+     vline left above hline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     +--------+
+     vline right above hline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     +--------+
+     vline left above hline at the bottom:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 +----+ 43 |
+     +---+----+----+
+     +-------------+
+     vline right above hline at the bottom:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     |41 +----+ 43 |
+     +---+----+----+
+     +-------------+
+     vline above hline at the bottom:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----+----+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     |41 +----+----+ 44 |
+     +---+----+----+----+
+     +------------------+
+     vline left above hline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     +--------+
+     vline right above hline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     +--------+
+     double vline left below hline top left:
+     +--------+
+     +---+----+
+     +---+ 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     double vline right below hline top left:
+     +--------+
+     +---+----+
+     +---+ 12 |
+     +---++---+
+     |21 ||22 |
+     +---++---+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     double vline left below hline at the top:
+     +-------------+
+     +---+----+----+
+     |11 +----+ 13 |
+     +---++---+----+
+     |21 ||22 | 23 |
+     +---++---+----+
+     |31 | 32 | 33 |
+     +---+----+----+
+     +-------------+
+     double vline right below hline at the top:
+     +-------------+
+     +---+----+----+
+     |11 +----+ 13 |
+     +---+----++---+
+     |21 | 22 ||23 |
+     +---+----++---+
+     |31 | 32 | 33 |
+     +---+----+----+
+     +-------------+
+     double vline below hline at the top:
+     +------------------+
+     +---+----+----+----+
+     |11 +----+----+ 14 |
+     +---+----++---+----+
+     |21 | 22 ||23 | 24 |
+     +---+----++---+----+
+     |31 | 32 | 33 | 34 |
+     +---+----+----+----+
+     +------------------+
+     double vline left below hline top right:
+     +--------+
+     +---+----+
+     |11 +----+
+     +---++---+
+     |21 ||22 |
+     +---++---+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     double vline right below hline top right:
+     +--------+
+     +---+----+
+     |11 +----+
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +--------+
+     double vline left below hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     double vline left above hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     +--------+
+     double vline right below hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     +---+ 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     double vline right above hline in front:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     +---+|42 |
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     +--------+
+     double vline left below hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---++---+----+
+     |31 ||32 | 33 |
+     +---++---+----+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     double vline left above hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---++---+----+
+     |31 ||32 | 33 |
+     +---++---+----+
+     |41 ++---+ 43 |
+     +---+----+----+
+     |51 | 52 | 53 |
+     +---+----+----+
+     +-------------+
+     double vline right below hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 +----+ 23 |
+     +---+----++---+
+     |31 | 32 ||33 |
+     +---+----++---+
+     |41 | 42 | 43 |
+     +---+----+----+
+     +-------------+
+     double vline right above hline in the middle:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----++---+
+     |31 | 32 ||33 |
+     +---+----++---+
+     |41 +----+|43 |
+     +---+----+----+
+     |51 | 52 | 53 |
+     +---+----+----+
+     +-------------+
+     double vline below hline in the middle:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 +----+----+ 24 |
+     +---+----++---+----+
+     |31 | 32 ||33 | 34 |
+     +---+----++---+----+
+     |41 | 42 | 43 | 44 |
+     +---+----+----+----+
+     +------------------+
+     double vline above hline in the middle:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----++---+----+
+     |31 | 32 ||33 | 34 |
+     +---+----++---+----+
+     |41 +----++---+ 44 |
+     +---+----+----+----+
+     |51 | 52 | 53 | 54 |
+     +---+----+----+----+
+     +------------------+
+     double vline left below hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     double vline left above hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     |41 ++---+
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     +--------+
+     double vline right below hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 +----+
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 | 42 |
+     +---+----+
+     +--------+
+     double vline right above hline at the end:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     |51 | 52 |
+     +---+----+
+     +--------+
+     double vline left above hline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     +---+ 42 |
+     +---+----+
+     +--------+
+     double vline right above hline bottom left:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     +---+|42 |
+     +---+----+
+     +--------+
+     double vline left above hline at the bottom:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---++---+----+
+     |31 ||32 | 33 |
+     +---++---+----+
+     |41 ++---+ 43 |
+     +---+----+----+
+     +-------------+
+     double vline right above hline at the bottom:
+     +-------------+
+     +---+----+----+
+     |11 | 12 | 13 |
+     +---+----+----+
+     |21 | 22 | 23 |
+     +---+----++---+
+     |31 | 32 ||33 |
+     +---+----++---+
+     |41 +----+|43 |
+     +---+----+----+
+     +-------------+
+     double vline above hline at the bottom:
+     +------------------+
+     +---+----+----+----+
+     |11 | 12 | 13 | 14 |
+     +---+----+----+----+
+     |21 | 22 | 23 | 24 |
+     +---+----++---+----+
+     |31 | 32 ||33 | 34 |
+     +---+----++---+----+
+     |41 +----++---+ 44 |
+     +---+----+----+----+
+     +------------------+
+     double vline left above hline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---++---+
+     |31 ||32 |
+     +---++---+
+     |41 ++---+
+     +---+----+
+     +--------+
+     double vline right above hline bottom right:
+     +--------+
+     +---+----+
+     |11 | 12 |
+     +---+----+
+     |21 | 22 |
+     +---+----+
+     |31 | 32 |
+     +---+----+
+     |41 +----+
+     +---+----+
+     +--------+
+
+OpenBSD                          June 15, 2017                         OpenBSD