% heyawake 20 by Warai Kamosika, http://www.janko.at/Raetsel/Heyawake/020.a.htm
heyawake
very hard
24 14
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|.|.....|3......|...|.|.|.|1..|...|.....|.....|.|
|.+-----+.......|...+-+-+.|...+---+.....+---+-+.|
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|.+-+---+-+-----+...|...+-+---+...+-+---+...|.|.|
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|...|.....|...|...............|...|.|...|...|.|.|
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|2......|.....|.|.......|.....|.|.............|.|
|.......|.....|.|.......+-----+-+-----+-------+-+
|.......|.....|.|.......|2............|2........|
+-------+-----+-+-------+-------------+---------+
