% slitherlink 665 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/665.a.htm
slitherlink
medium
17 17
.223213...23..320
3.....2.1..22....
....2.2.322212.13
3.1.13..2..1...2.
31322.213.3321...
3...312..11.233..
2..2...3....111..
3..3..0222.21.22.
2.....33.3.2..212
23.........212..2
.223...2..2..3212
.2...2....332.3..
.1.....12..13..2.
.22.222..223...3.
1212322222.13..2.
2..2.2.2..223.2..
.2.2.1.22...3222.
