sub match {
        my ($hash, $filter) = @_;

        if($filter->[1] eq '<=') {
            return( $hash{$filter->[0]} <= $filter->[2] );
        } elsif($filter->[1] eq 'eq') {
            return( $hash{$filter->[0]} eq $filter->[2] );
        } else {
            die "unsupported comparator: $filter->[$index]->[1]";
        }
    }

    if(
        match($hash, $filters->[0]) and
        match($hash, $filters->[1]) and
        match($hash, $filters->[2]) 
    ) {
        print OUTFILE $line, "\n";
    }