% hitori 470 by Otto Janko, http://www.janko.at/Raetsel/Hitori/470.a.htm
hitori
medium
12 12
637a1b995c76
2a356acb69b1
98b828367cac
9993626821aa
428435b71369
b7c47922ca16
1126739a23cb
cb1187593692
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a521b2a38c42
1c66a34c27c8
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