% nurikabe 4 by Warai Kamosika, http://www.janko.at/Raetsel/Nurikabe/004.a.htm
nurikabe
easy+
10 10
....3.....
.3........
..3.3...3.
.........3
..........
3.....3...
.....3..3.
..3......3
..........
3....3....
