% slitherlink 372 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/372.a.htm
slitherlink
medium-
10 10
3122.122..
...1.3..32
2.2..22...
1.......3.
.23....1.1
..3......2
22.21.121.
..3323....
.222.2.212
....223322
