% slitherlink 216 by Oleg Andrushko, http://www.janko.at/Raetsel/Slitherlink/216.a.htm
slitherlink
very hard
36 20
.2.3..1.2..3.121....131.3..0.2..2.1.
3.2.31..3201..3..30..3..3233..31.1.3
.0..3..3.......1....3.......0..1..0.
1.3...0.11.03.3.3211.2.22.01.3..11.3
.0...1.3.....0........3.....2.3...0.
.2.02...1.321.1..33..3.220.1...21.2.
30..3..3.0..2...3..0...3..1.0..3..03
...2..0...2..3..1..2..1..3...3..1...
.3..3..10.3.0.21....32.3.2.21..1..0.
2.0..1.2.1.3.3..3..0..3.2.3.2.3..3.3
3.1..2.0.3.3.2..0..2..3.2.2.2.3..3.3
.3..3..11.0.3.33....32.2.1.22..2..1.
...3..2...3..0..3..0..2..0...2..0...
01..0..3.0..1...2..3...3..3.2..2..32
.3.22...3.123.3..20..3.031.3...01.0.
.1...1.1.....2........2.....2.1...1.
0.30..1.02.10.3.3122.3.21.31.2...0.3
.1..1..3.......0....2.......3..3..3.
3.3.03..2230..3..03..3..3112..31.2.1
.2.1..0.1..3.311....101.3..3.0..0.3.
