% nurikabe 215 by ooya, http://www.janko.at/Raetsel/Nurikabe/215.a.htm
nurikabe
medium
17 17
...1.4..........2
1.......1....2...
...........4.....
..3.5.3...4....2.
.................
.6.....2.....2...
..2.....2.....3..
.................
..2.....c.....9..
.................
..2.....2.....1..
...2.....2.....6.
.................
.4....2...3.3.5..
.....2...........
...4....5.......3
1..........3.1...
