% hitori 523 by Otto Janko, http://www.janko.at/Raetsel/Hitori/523.a.htm
hitori
medium-
10 10
6187921273
5761413198
2945a64871
1a96488482
1546366a25
416a278559
8414745936
7248139759
395464a147
287914a6a4
