% slitherlink 164 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/164.a.htm
slitherlink
medium
16 12
....1.22...0.33.
2.131.1.2032.12.
2.23...3.......2
2..232...1.3222.
2..12.33.....2.2
0....1....23....
2.3.12.....1213.
.......12......3
.23..221..3..3..
21.22...1..2...3
..323121231..232
3.3.......3..1.3
