% nurikabe 365 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/365.a.htm
nurikabe
medium-
13 13
..2........3.
....2..1.....
3..4..3..2..1
.1...........
.........2...
......3....4.
.4.1.........
..1..3......1
4.........2..
..3..........
........4.3..
............2
2..3..4...3..
