% slitherlink 139 by Oleg Andrushko, http://www.janko.at/Raetsel/Slitherlink/139.a.htm
slitherlink
medium
18 10
..3.12.20..131..2.
...3.....3....2.13
30...33..3.13...2.
..13........11...1
.3..23..31....1.3.
.3.1....13..31..0.
0...20........31..
.3...33.2..21...03
12.0....0.....3...
.2..232..22.21.0..
