% slitherlink 672 by Luke Pebody, http://www.janko.at/Raetsel/Slitherlink/672.a.htm
slitherlink
medium-
10 10
2.....3.2.
...3.212..
13.....0..
.....2..1.
...203.3..
3.3....2..
1...21.2..
.3222.2.1.
.1.......3
3.22..3.3.
