% slitherlink 681 by Grant Fikes, http://www.janko.at/Raetsel/Slitherlink/681.a.htm
slitherlink
medium-
10 10
..........
.30.22.30.
.21.32.32.
..........
.31.22.22.
.31.12.23.
..........
.31.02.13.
.13.12.03.
..........
