% nurikabe 387 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/387.a.htm
nurikabe
medium-
15 15
............1..
4.............2
....3..3....2..
..2..3....3....
2.......2......
..3..1...4...2.
.......4.......
.2...2........2
1.3.........2..
..........3....
..3..5..2..1.2.
...............
3....2..2..3...
...............
1.3.2.2..3..1.3
