% slitherlink 786 by Tom Collyer, http://www.janko.at/Raetsel/Slitherlink/786.a.htm
slitherlink
hard-
18 10
.3.12.1..312..202.
...11.......1.2.2.
.3.2.2..333....1..
......3......3..3.
....3.3.0..3.3.3.3
2.1.3.3..1.3.3....
.3..3......3......
..2....333..2.2.3.
.0.1.2.......23...
.220..212..0.12.1.
