I think you might be running into trouble at:
@list = <PASSF>;
I think this will put all user input up to and including the newline into a scalar that is the first entry of your array. You might want to try something like this:
my $User_Entry = <PASSF>;
my @list = split(/ /, $User_Entry);
.
.
.
I also highly recommend the use of
use strict;
use warnings;
and even
use diagnostics; They can be very helpful.
Another device that can help out a lot is to use
print statements to verify that variables contain what you think they do.
use Data::Dumper; can also help you know what is in a data structure.
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