% nurikabe, nikoli sample problem 4 by Casty
nurikabe
easy
18 10
..4............1.3
.3....5...1.2.....
.......5.3........
............2.3...
..4.............3.
.3.............4..
...1.1............
........3.4.......
.....1.1...5....5.
4.4............3..
