% slitherlink 219 by Oleg Andrushko, http://www.janko.at/Raetsel/Slitherlink/219.a.htm
slitherlink
very hard
36 20
.233.3.0.31..11.3201.10..13.0.3.101.
2..1...3...1...3....3...0...3...2..2
0....2....1.3.0..01....3.3....1....2
13..13...13..........0...32..1.3..01
...3....1..023..3..0..111..3....0...
.1.....3......110..220......0.....1.
3...010.2.3.3....11....3.2.3.203...1
.022..3..111..12.31.31..013..2..120.
1..2.........3..3..3..2.........3..2
3.1.1..22.0.10..2..2..01.3.10..1.1.1
2.3.3..10.2.21..0..3..12.0.21..1.1.2
0..1.........1..1..1..3.........3..2
.130..0..232..01.20.31..022..0..211.
0...133.2.0.3....21....3.3.3.231...3
.3.....1......220..201......3.....1.
...0....3..331..3..1..101..0....1...
20..2.3..11...3..........03...10..30
1....3....2.0....03..2.1.3....3....2
2..2...0...1...0....2...1...3...1..2
.321.0.3.32..31.1211.20..22.3.3.233.
