#!/usr/bin/perl

open(F1 "<file1.txt") or die "Can't open\n";
open(F2 "<file2.txt") or die "can't open\n";

my @field = ();
foreach (my $line = <F2>) {
    push (@field, $line);
}
my $string = join(",",@field);
my @f = split(/,/, $string);

my @unique_f = split(/,/, unique(@f));


while ($m_line = <F1>) {
if !($m_line =~ m/????????/i)





sub unique {
    my %seen = ();
    my @r = ();
    foreach my $a (@_) {
        unless ($seen{$a}) {
            push @r, $a;
            $seen{$a} = 1;
        }
    }
    return @r;
}


#I have gotten this far but now I want to use regular expression that matches each entry of the second column of file1 to the entire @unique_f.  Thus, if the match is NOT DEFINED, then it should print the whole line.
Thanks!