% nurikabe 542 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/542.a.htm
nurikabe
medium-
16 12
.......7..2.2...
..8............2
.2.8.......2..2.
.........6......
...........2....
.............2.2
.2.....2........
....2..........2
3.2....2..2.3...
...............2
................
.2..2.3..3....3.
