#!/usr/bin/perl
use strict;
use warnings;
use open ':utf8';

use Getopt::Long;

my $conf  = {}; # configuration hashref
initialize($conf);

open FP, '<', shift or die "Can't open input file: $!\n";

while (<FP>) {
    my ($lead,$sub) = split /\t/;
    print $sub if $sub > 6999999)
}

sub initialize {
    my ($c) = @_;
    my @missing = ();

    # set mode on existing filehandles
    binmode(STDIN, ':utf8');

    my $rc = GetOptions( $c,
                         'filter|f=i'
                         'output|o=s',
                         'help|h',
                       );
    show_help() unless $rc;
    show_help() if ($c->{help});

    my @keys = keys %{$c};
    show_help() unless (@ARGV and @keys);
    for my $key ('output', 'filter')
      { push @missing, $key unless $c->{$key} }
    if (@missing) {
        print "Required option: ", join(', ', @missing), " missing!\n";
        show_help();
    }
}

sub show_help {
    print <<HELP;
Usage is: extract_loadset [ARGS] INPUTFILE

  --filter  -f  Record ID lower bound for 
  --output  -o
HELP
exit;
}