% nurikabe 508 by Grant Fikes, http://www.janko.at/Raetsel/Nurikabe/508.a.htm
nurikabe
medium-
17 17
..5....1...7.....
.3......3......4.
....8......1.....
.................
8.........7....2.
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3................
......3....1.1..4
..1....7.4....7..
3..2.5....4......
................2
.................
.3....4.........1
.................
.....3......4....
.2......2......1.
.....4...6....2..
