% nurikabe 477 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/477.a.htm
nurikabe
very hard
12 12
.....7..3...
............
3..2........
.3.....3.2..
.....2......
.........1..
7.....2.1..7
....5..3....
...2.....2..
...........2
............
.7....6.....
