% heyawake 50 by Warai Kamosika, http://www.janko.at/Raetsel/Heyawake/050.a.htm
heyawake
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10 10
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|3..............|2..|
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|.|4....|1......|...|
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|.|.....+-----+-+-+-+
|.|.....|3....|...|.|
|.+---+-+.....|...|.|
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|.|...|.+---+-+---+.|
|.|...|.|2..|2....|.|
|.|...|.|...|.....|.|
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|.|...+-+---+---+-+-+
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+-+---+-+-------+-+-+
|.......|...........|
+-----+-+---------+-+
|.....|...........|.|
+-----+-----------+-+
