Why not use your regex to ask the same question of Perl itself? 
#!/usr/bin/perl -w
use strict;
my $str = 'DPL1 DPLx RVLj ILKy VLKy Bartleby the ScriFVKner';
while ($str=~ /(DPL.|RVL.|[IV]LK.|FVK.)/g){
    print "matched '$1' in string '$str'\n";
}

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In reply to Re: use of 'or' in regex by mrbbking
in thread use of 'or' in regex by Becky

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