% hitori 503 by Otto Janko, http://www.janko.at/Raetsel/Hitori/503.a.htm
hitori
medium-
10 10
a638978247
9286317aa5
1877768921
2651719641
1a43572998
965a541389
3411aa6a78
6984821137
45911a5262
57a1494811
