% hitori 400 by Otto Janko, http://www.janko.at/Raetsel/Hitori/400.a.htm
hitori
medium
12 12
13b1768743c8
a8394b3cb675
15a85cbb2968
46cb31557222
3c378b416aa9
5486a4a2c3b7
794c3c17574a
215a4b7c9826
372acab58c1a
7764a2a5c1a3
4243b4c96751
5b78a565345c
