% nurikabe 487 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/487.a.htm
nurikabe
medium-
10 10
.3..9..3..
..4...4...
.........3
..........
3.........
..........
.4.....3..
......9...
2...2.....
..........
