% nurikabe 556 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/556.a.htm
nurikabe
hard-
16 12
..2............9
................
3.2..3.........2
..........2.....
.....4.....3....
.4..3..........3
2.........3..3..
................
..2...3.3.3.....
2...2.........3.
................
...3..2.2.3....3
