% nurikabe 447 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/447.a.htm
nurikabe
medium-
10 10
.8.9....3.
..........
.......3.3
..........
...2......
.....3..3.
.3.......4
..........
....2.....
...4...2..
