% heyawake 160 by Halflength Sleeve, http://www.janko.at/Raetsel/Heyawake/160.a.htm
heyawake
very hard
36 20
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+---+-----+-----+-+-+-----+-----+.....|.....|.|.........|.|...|...|.....|
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|.....|...+-----+---+...+-----+.|...+-------+-----+...|.....|.......|...|
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+-----+---+.........|...|.....|.|...|.............|...|.....|.......|...|
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+---------+---------+---+-----+-+---+-------------+---+-----+-------+---+
