% nurikabe 417 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/417.a.htm
nurikabe
hard
10 10
2.........
..2..7....
....2..3..
..2.......
........3.
....3.....
.........3
....2..3..
..9.......
9.........
