% nurikabe 473 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/473.a.htm
nurikabe
medium-
12 9
7........3..
............
...6.....7..
.....7......
....2..2....
..........2.
....2...3...
.....3......
....6....2..
