% slitherlink 677 by Luke Pebody, http://www.janko.at/Raetsel/Slitherlink/677.a.htm
slitherlink
hard-
19 16
..2..23.2...2.2.1..
232.2.1..3.21.2...2
...22..321212..2...
212..23.2....33.3.3
232231.0....3....23
2.1...3222.0.2...2.
.31..22...3...1....
.....2211...3.11.1.
.32.31.3.3.321..312
122.....1..2..2...3
2......2.22....31..
21.22..2..021.1.23.
..33.13...2.2.2..2.
3.2.3.2.2...1.3....
.......3.....3..2.3
3.1..32..321222..2.
