% slitherlink 615 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/615.a.htm
slitherlink
medium-
18 10
1.11....13....13.3
.3...31....33..3..
3..12..0..3..0.102
1.1..1.1..1.1....1
...3..3.21.1..2...
...3..1.30.2..3...
3....0.0..2.2..0.2
111.3..2..0..03..1
..0..10....11...1.
3.22....10....23.0
