I am trying to parse a word list that looks like this: 
dog
epithet
mannerism
...

[download]
From this list, I would like to extract all unique grapheme contexts for a user specified grapheme, with a user specified context limit. The code below does this for the first occurrence of said grapheme, but I don't know how to run the action multiple times on the same word (e.g. the two 'e's in epithet). Here is the meat of what I have so far, which works fine for the first occurrence of the grapheme. 
# $num = user specified context maximum
# $graph = user specified grapheme to search for
# note: this also holds the examples corresponding to the 
# given context.

while(<INPUT>) {

    chomp($_);
    if( /$graph/ ) {
    ($front, $back) = /(.{0,$num})$graph(.{0,$num})/;
    $con = $front.'_'.$back;
    push( @{$graph_contexts{$con}}, $_);
    } else {
    next;
    }
}

[download]

In reply to Performing a grep-like action multiple times on a single line. by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.