golfscript, 82 bytes

Result

WA

Duration

558ms

Code [DL]

"
"/);{' '/}%(\{[1$\]zip{{~}%{-}*}%}%.{}/\{(+\(+(+[@]zip{{*}*}%{+}*}:q~-\{}/q+6/\;

stdin

32 50 72
32 64 44
79 84 06
38 17 75

stdout

0-1428-47-3466-633-3273112

stderr

strace