% nurikabe 217 by ooya, http://www.janko.at/Raetsel/Nurikabe/217.a.htm
nurikabe
medium-
17 17
..5.......6.....5
.........5.......
..........5.....7
..5..............
5..5...2.........
.4...4..2........
.................
..........6......
................3
......3.....1..6.
.......2.........
..4.........3....
.........2.......
4.4........3.....
....4..5.......5.
4..2............4
..........3.5....
