% nurikabe 439 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/439.a.htm
nurikabe
medium
13 13
3.........3..
....2..2.....
3.........4..
.....2.2.....
.............
....2..2....4
3.3..........
........1....
3.4...2.....1
.............
...2....4....
..........5..
.4.5........3
