% slitherlink 441 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/441.a.htm
slitherlink
medium-
10 10
3232.12123
.321.2..22
....3...2.
3.........
..1..2.33.
3.....2..3
..30..2.22
2..3...1.2
.3.....2.2
3.3..23...
