% masyu 176 by Otto Janko, http://www.janko.at/Raetsel/Masyu/176.a.htm
masyu
medium-
18 12
....o.........o...
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.o..o....*.o....o.
....o......o...oo.
.o..o........*..o.
..*...o.o.o..o....
o.*.o.oo.....*.*.*
......*..*o.......
..*.......o.**....
*..o............o.
.o.....o.*..o.....
.....o...oo...*.*.
