% nurikabe 434 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/434.a.htm
nurikabe
medium-
12 12
...3....3...
....4.....4.
2.2...1.1...
............
.........4..
.3..........
......2.2..5
1..2........
........1..4
.5.....3....
4...........
....2.....4.
