% nurikabe 176 by ooya, http://www.janko.at/Raetsel/Nurikabe/176.a.htm
nurikabe
medium-
18 10
..4....5......2.3.
....4.....2.......
...3........2..1..
.2................
4......2.3........
....4.....4..4..3.
...3..............
............3.....
.4.....2...3..4...
...2....3........3
