% nurikabe 386 by Otto Janko, http://www.janko.at/Raetsel/Nurikabe/386.a.htm
nurikabe
medium
15 15
.3..2.1.2.2...3
...............
.4.3...3......3
...............
.......5.2..4.3
........1.3....
.......1.......
.4..4.1.2....3.
...............
...3...4.7....3
1...........3..
...............
.....4.....4.2.
.3.............
.....3..2......
