% slitherlink 584 by Luke Pebody, http://www.janko.at/Raetsel/Slitherlink/584.a.htm
slitherlink
medium-
10 10
.3...3....
.21.1213.2
2.122.....
31.212..3.
3.2122..3.
2..3.22.2.
.3022....2
131..23..2
.22.2223.3
.2.2.12.22
