% slitherlink 415 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/415.a.htm
slitherlink
medium-
10 10
.1.......3
222..121..
2...3.....
3321...112
.2.3..2.2.
223..1...3
....2..31.
.22....31.
32..2...2.
3...3.2313
