9 9 1
aaabbbccc
aaabbbccc
aaabbbccc
dddeeefff
dddeeefff
dddeeefff
ggghhhiii
ggghhhiii
ggghhhiii
...9.....
729..6.3.
.....789.
.7.89..5.
5..6.4..8
.4..51.6.
.143.....
.9.7..243
.....9...