% nurikabe 337 by Halflength Sleeve, http://www.janko.at/Raetsel/Nurikabe/337.a.htm
nurikabe
medium-
18 10
.4.1..............
..........4....6..
..............2.5.
.1...6.5..........
........4.........
............1.....
7...5.............
...2.....a........
6.................
.....4.......5.6..
