% slitherlink 667 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/667.a.htm
slitherlink
medium
24 14
.31...32223.22..32...222
..2221....1221322.....22
.............1.2132..13.
..213231..32..3.2..3.22.
...3.2......323..312...2
2..2.3.1222.21213.2323.0
..2.21...121233....212.2
202..2.1.2.10...1212232.
.321.1...3..3.1..3..213.
..2...3112.......11..321
...23......12222..22.2.2
30..122022.2.13....23221
.....232.2....323.2122.2
.2.322.....32...22323..2
