% nurikabe 509 by Grant Fikes, http://www.janko.at/Raetsel/Nurikabe/509.a.htm
nurikabe
medium-
24 14
3......1................
.....1..2.4.2.........1.
2...............1...1..8
...3....................
.......4...7............
............4..........3
.....5....3...i.........
...2..............1.....
.....3........7........2
....1............3......
............1.....4.....
.....k..........1...5...
.1................5.....
...k...........2......5.
