I have a file and i need to match one line and extract it.

the line is as follows:

12..13 13..14 14..15 15..1 15..2 14..3 13..16 16..4 16..17 17..5 17..18 18..6 18..7 12..19 19..20 20..8 20..10 19..9 12..11

I tried all ways of getting that line and i failed. The combinations i tried are: 

  for(my $i = 0; $i <= $#filedata; ++$i){
    if($filedata[$i] =~ m/\d\.\.\d/){
       my $branch = $filedata[$i];}}
 print("$branch \n");

[download]
That was the last thing i tried the others are : 
if($filedata[$i] =~ m/\d..\d/)
if($filedata[$i] =~ m/\.\./)
if($filedata[$i] =~ m/\d+\.\.\d+/)
if($filedata[$i] =~ m/../)
if($filedata[$i] =~ m/\../)

[download]
Suggestions are welcome on how to get this line

After getting this line I again need to seperate and have 12..13, 13..14, 14..15 etc..

In reply to Regular expressions and metacharacters by Jaya

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