% nurikabe 568 by Grant Fikes, http://www.janko.at/Raetsel/Nurikabe/568.a.htm
nurikabe
medium-
17 17
............a....
....2........3...
.....3..........5
........1......5.
.4...5...2.......
..5...1..........
...............7.
...2.....4....7..
..2.....2........
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............4....
......a....1...4.
..6..2..4...1...5
.2.....1..1......
.....7.....5.....
....6............
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