% nurikabe 577 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/577.a.htm
nurikabe
hard-
18 10
2..3.4...2....8..2
..................
2.....7....2......
..................
.2.2.2.......2....
.........2........
3...2......4......
.............3....
2.2...3...2....3.4
....3........4....
