Hi, I'm trying to extract the beginning part of a path like string. The following script: 
use strict;
my @input = ("A/B/C/D/E/F/", "A/B/C/D/","A/B/C/D","A/B/C/", "A/B/C","A
+/B","A");
foreach (@input){
  print "$1\n" if m|((?:\w+/){4})|;
}

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only matches the first two elements, and gives: 
A/B/C/D/
A/B/C/D/

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I'd like to have a regex that matches all elements in the input, i.e., match up to level 4, and also make the "/" at the end optional. Desired output: 

A/B/C/D/
A/B/C/D/
A/B/C/D
A/B/C/
A/B/C
A/B
A

[download]
What's the best way? Thanks.

In reply to regex greedy range by johnnywang

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