I think if you tested at the end of the loop, not the beginning, you would not have the problem with $op being undefined the first time.
my $op;
do { ... } until ($op =~/Q/i);
because you really do want it to go through once.
Also, instead of
if ($op =~/Q/i) {
print "Just hit enter to shuffle though all prompts\n";
}
which annoys the user with a last useless pass, just say
last if $op =~ /Q/i;
And then you don't even need the test at the end (or beginning) at all.
Also, are you aware of the ++ operator?
Basically, this is a specialized grep. That's a good use for Perl, in general.
—John
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