% slitherlink 438 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/438.a.htm
slitherlink
medium
16 12
.3.3.....2.....3
1...1311..3.13..
331.11..20.22.03
2.2.0222.3.2..2.
.21.22..11.1..2.
..3..2...3..12..
..31.12.11.31..1
.2...3..23.12...
.221..2..21..22.
.2.33....3..32..
.3.2..2.1211.0.2
.........2..333.
