% slitherlink 161 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/161.a.htm
slitherlink
medium
16 12
22312..3..22.2..
23..3..1.2..23.3
...1.1.222.3.2..
.2.22..3.2.231..
.1..221..2..222.
.....323...2.2..
221..2.2..2..2.1
..21..30.3..21..
.2..3..212222..2
3121..12.22.123.
3..1.....3.3....
.3.3.1.....3.33.
