% nurikabe 435 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/435.a.htm
nurikabe
medium-
12 12
...3.2..4..4
............
.2.......1..
4....1.....3
........5...
.........1..
...3......1.
.2..1...4...
......2.....
2...3.....2.
...........3
.2.3....2...
