% slitherlink 647 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/647.a.htm
slitherlink
medium
24 14
.1..1.....21.2233.12.22.
3232232312.....203.22...
2.3..2....1.......1.3.13
3.2..122..2..2..12.2.12.
.1..2...2121313.2..1..33
3...22.12.3.3.2.22.3212.
..1...1112313.332.......
....20.32..2..11..2.23..
..1.3.302...2..22...2...
.3..2..2..322..0.20.3...
.3123122.2.....132..1...
..2.221..2.32...32..1203
..2.3.22....1........323
........322213232221322.
