% slitherlink 51 by Oleg Andrushko, http://www.janko.at/Raetsel/Slitherlink/051.a.htm
slitherlink
hard-
9 9
.32......
.1..20.31
..2..0...
0.22..3.3
1.2.1...2
...3.....
3.1.11112
.1..22..2
1.3..0.2.
