% slitherlink 555 by Luke Pebody, http://www.janko.at/Raetsel/Slitherlink/555.a.htm
slitherlink
medium-
10 10
23.2...3.3
.1.23...3.
1.2211....
2..2.2..32
.13...12..
.21.212..3
1.........
..12.2.32.
.321.2.2..
23..3..1..
