% slitherlink 577 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/577.a.htm
slitherlink
hard
24 14
..023..3.2.22..333.20..2
312..21...2..2.........3
.......23.13.2...20..13.
1...1.10..2..0...2.3..2.
23.3.3...1.3..2....0.2.3
..3.1...3..3.30.2.3..3..
.2.1.3.3..2.2.2..2.12...
...32.0..2.1.1..3.3.2.3.
..2..2.3.32.3..2...2.2..
3.1.3....3..3.0...1.3.30
.2..2.3...3..1..23.0...1
.03..30...2.33.32.......
3.........3..1...33..130
2..20.320..33.3.3..232..
