You might want to convert the strings to soundex and then compare them:
$longest = soundex of longer string
$shortest = soundex of shorter string
if ($longest =~ /$shortest/) {
...
}
as a quick check. Then do the same for un-soundex versions. if not exact, perhaps try exact word s/// - if no word chars left, assume it's the same quote (or subset of).
cLive ;-)
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