% nurikabe 170 by ooya, http://www.janko.at/Raetsel/Nurikabe/170.a.htm
nurikabe
medium-
18 10
......3...........
5........2......8.
..3........1......
4.......4...4..4..
..5........4.....4
.......6..........
..................
.........1.7......
.5....1.........1.
..5..........7....
