CJam, 77 71 70 69 63 bytes
r_,3*_Sa*a*\{~"÷Ðëúܾ¿ðÿþ"=i2bS"\/"4*W<+.*3/\2fm>2m>..e>}/Wf%N*
All characters are printable, so copy and paste should work just fine.
Try it online in the CJam interpreter.
CJam,
Dennis
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