% nurikabe 293 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/293.a.htm
nurikabe
medium-
13 13
........4....
..3.......3.5
2..1....4....
.............
4..5..1.2....
..........1.3
.............
....3..4.1...
............2
3.3......2...
...4...1...2.
.........2...
2.....2...3..
