% nurikabe 429 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/429.a.htm
nurikabe
medium-
13 13
....3.2......
..3.........3
4............
.......3....1
....3.2...5..
.........2.1.
3.6..........
....3.1..3..1
.............
3............
......3.3..4.
....2........
............3
