% slitherlink 591 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/591.a.htm
slitherlink
medium-
10 10
..20..33.1
2........3
0.1..2..1.
13.3..30.2
..2.1....1
3....0.3..
1.22..1.02
.3..3..2.3
0........1
1.23..02..
