% slitherlink 218 by Oleg Andrushko, http://www.janko.at/Raetsel/Slitherlink/218.a.htm
slitherlink
very hard
36 20
.3.0.....3.....1.12..33...3..3..02.1
1..3.33..31.30..2..23...13..0..3..1.
2.0....1...1....03...0.....33.32.2.2
....333.02..13........31..2.1...3..2
33..2..3....3.01...23.2..3.3.1...23.
...0.2...1....2..23.......1.3.3..0..
..3..1..13.2..20.2.1.31...3..1.032..
02..3.......13...3.3...3.2.2.3.2...0
2..30.21..210.22..0.01..2.3.....2.1.
2..3..2..3....3.3.2.3.3.3..22.21..3.
.3..22.30..2.3.2.2.1.0....1..3..3..3
.3.2.....3.3..22.2..12.323..03.11..2
1...3.3.1.1.0...3.3...01.......3..30
..021.0..1...30.1.2.11..1.31..2..0..
..2..3.3.3.......33..3....3...0.2...
.30...1.1.2..3.33...03.3....3..3..30
2..2...2.3..02........12..33.220....
3.1.32.01.....3...13....3...1....1.3
.1..2..2..32...12..2..13.12..33.3..3
3.33..1..0...31..02.3.....3.....3.2.
