% nurikabe 168 by ooya, http://www.janko.at/Raetsel/Nurikabe/168.a.htm
nurikabe
medium-
18 10
...............3..
..1........7....9.
....4....c........
3.................
.2................
.......8.........2
....1.......d.....
..............3...
.2...............3
...........6......
