% heyawake 303 by Iwa Daigeki, http://www.janko.at/Raetsel/Heyawake/303.a.htm
heyawake
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|3......|...|5....|3....|
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+-----+-+---+.....|.....|
|3....|.....|.....|.....|
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+---+-+-+---+.....+-+---+
|2..|3..|...|.....|1|2..|
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|...|...+-----+---+.+---+
|...|...|.........|.|...|
+---+---+---------+-+---+
