% slitherlink 613 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/613.a.htm
slitherlink
medium-
18 10
3.3....1.20.0.3..3
.1.03.3.1..3.2....
1....2..0.3...32.0
.3..3....1.2.1..3.
..10..13.1..2....1
0....3..3.33..13..
.1..2.0.2....0..1.
3.32...1.2..1....1
....2.3..0.1.33.3.
0..3.3.11.3....3.1
