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        'numeric-sort|n' => sub { $Opts{sort} = 'numeric' },
        'sort=s' => \$Opts{sort},
        'sort-field=i' => \$Opts{sort_field},
        'rank=s' => \$Opts{rank},
        'show-rank!' => \$Opts{show_rank},
        'show-percentile!' => \$Opts{show_percentile},
        '-p' => sub { $Opts{show_percentile} = 1 },
        'help|h' => sub {
            print <<USAGE;
Usage:
  rank [OPTIONS]... [INPUT]...
  rank --help

For more details, see the manpage/documentation.
USAGE
            exit 0;
        },
        'version|v' => sub {
            no warnings 'once';
            say "rank version ".($main::VERSION // 'dev');
            exit 0;