Help in vb excel macro

Hello,
i got a trouble in vb, i try to record my own macro or find a good one for my problem on internet. I'm a newby in vb, i understand a bit the base of vb but really i'm not a crack...

My problem, i'm making a list of padlock with serial numbers, open code, from an old paper list. I'm scanning all the sheet with ocr sanner. But a got 3000 line to do. The scanning give me this.

a1                  b1                       c1                      d1                     e1                   f1
(serial)            #1                       #2                     #3                    empty             empty
77654566         32                       22                     12

That great, but now i need to take 3000 line of those number and put it in a6 in format 32-22-12
it suppose to look like this.

a1                  b1                            c1                      d1                       e1                       f1
(serial)          empty                    empty                 empty                  empty                   #1-#2-#3
77654566                                                                                                             32-22-12

So you can imagine what is a pain in the ass to do 3000 line of copy paste....i try to record my own but as soon i'm trying to copy the second number into the same cell, The recording doesn't reconize it ??
So i need your help very badly.

Fmasse