% slitherlink 67 by Hirofumi Fujiwara, http://www.janko.at/Raetsel/Slitherlink/067.a.htm
slitherlink
medium-
10 10
11..1..2.3
..23.12...
2.3..0...3
2..0..3..1
...23.31..
..2......3
.3.1.2.0.3
2.23...1..
.1.2...0..
3..1..1.3.
