type . to make black squares, source on
github
-
rows
+
-
columns
+
solve
clear all
E
O
T
T
H
O
T
A
Q
B
T
T
U
E
E
O
I
S
B
O
S
T
E
I
R
O
T
H
N
N
.
.
.
.
.
.
.
.
.
.