% hitori 528 by Otto Janko, http://www.janko.at/Raetsel/Hitori/528.a.htm
hitori
medium
12 12
412c66b77587
2a4169132b2c
abb648795612
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cba44782936a
684a2435c491
6c71b1649a26
759382c6a4b7
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14288a596c79
