% nurikabe 375 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/375.a.htm
nurikabe
medium-
13 13
.....2..1...3
.......1.....
2.3......2..3
.3...........
....2.3......
........1...2
3...2........
......3...3..
...........1.
..3..3..3....
.......4..2..
.............
5.3.......2.3
