% nurikabe 541 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/541.a.htm
nurikabe
medium-
16 12
.2..............
........2...2.2.
....5.3...3.....
...2.2..........
.2......2....3..
...............3
3......2..3.....
.....3......3...
3......2.......2
....2....2.2.3..
..3.............
...3.....3.5....
