% nurikabe 555 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/555.a.htm
nurikabe
hard-
10 10
...4..2.3.
..........
2...3..6..
.....9....
.3........
........3.
4.........
....3.....
..........
....3..3..
