% slitherlink 40 by Oleg Andrushko, http://www.janko.at/Raetsel/Slitherlink/040.a.htm
slitherlink
medium-
7 7
.1.1..1
1...11.
..1.1.1
.1.11..
.1.1.1.
....1.1
1111.1.
