% nurikabe 432 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/432.a.htm
nurikabe
medium-
12 12
.3..2....4.2
......2.....
.....3......
.......4....
.....1...3..
..5.........
4...1..2.2..
............
..1...3..2..
4....3......
.........2..
..2...4.....
