% slitherlink 426 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/426.a.htm
slitherlink
medium-
14 10
2222.12.33.3.3
.22.1.....2..2
...321132...3.
..212.......23
1..232..3.3..2
..23.....2.2..
22.2..2.13.2.1
..23.21322.2.2
2....32...3131
...3.2.....1..
