% hitori, nikoli sample problem 7 by Casty
hitori
hard
12 12
12743538963a
12a693b5784c
413826252a79
a6b147953827
65616ba76263
2391b46358a7
b437a2a61958
772b5c1b8b97
8845aca2a731
99127c5348b6
5b3a18741c32
1a598949b3c7
