% heyawake 252 by Mokuani, http://www.janko.at/Raetsel/Heyawake/252.a.htm
heyawake
easy+
10 10
+-+-----+-----+-----+
|2|0....|.....|.....|
|.|.....|.....+-----+
|.|.....|.....|4....|
|.|.....+-----+.....|
|.|.....|.....|.....|
+-+-+---+.....|.....|
|1..|3..|.....|.....|
|...|...+---+-+-+---+
|...|...|2..|...|...|
|...|...|...|...|...|
|...|...|...|...|...|
+---+-+-+---+...|...|
|2....|2....|...|...|
|.....|.....+---+-+-+
|.....|.....|4....|1|
|.....+-----+.....|.|
|.....|2....|.....|.|
+-----+.....|.....|.|
|1....|.....|.....|.|
+-----+-----+-----+-+
