% nurikabe 569 by Grant Fikes, http://www.janko.at/Raetsel/Nurikabe/569.a.htm
nurikabe
medium-
17 17
.......8........7
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..4.2..1.........
...........1.4...
..3.3..2.........
...........3.4...
.......2.........
1.c.5.1..........
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..........2.3.3.8
.........3.......
...9.2...........
.........3..4.3..
...1.2...........
.........4..2.4..
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1........a.......
