% slitherlink 91 by Hirofumi Fujiwara, http://www.janko.at/Raetsel/Slitherlink/091.a.htm
slitherlink
very hard
16 12
..3..3.13.2.32.0
3..1...2.2......
..3.30...13....3
2......0...1.212
.3.1.1...11..0..
....3.0.2.....3.
2.1.....01..3.1.
30..02.3...1.3.2
....3....21....2
..21.1....3.20.1
3...3....3...1..
.3....3..1.12.31
