% nurikabe 389 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/389.a.htm
nurikabe
medium-
15 15
1.3...3.2.4...2
...............
3.5............
........3..2..2
.....2.3..4....
2..4.........2.
...............
1.4...4...2....
.....3......2..
7......2...4...
.........2...1.
...1...........
....4...3......
..........2.3..
3...1..........
