% slitherlink 657 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/657.a.htm
slitherlink
medium
24 14
....22..333323232.2..2..
..23...2....2...22013232
.232.2.3223.221.110..122
31213..12.......2..31.2.
..32.2...1.2.2.23222..1.
.12212122...1...1.....3.
..3233222.131.0.......1.
..2...2.3.....1122..2.3.
..23....3232.2.........2
..1.2..21....222.......3
..3..2.2........21.212.2
12021.1..21.2323.2..2233
2...2.3213...212....32.2
.2.22.2.........3332....
