% slitherlink 612 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/612.a.htm
slitherlink
medium-
10 10
3.12..1.3.
.2...1.2.3
3.1....12.
3..132...3
..0...3...
...1...1..
3...233..0
.13....1.2
3.3.1...2.
.2.0..20.3
