HEADER:
    while (<STDIN>)  {
        print "--> $_";
        last HEADER
            if /^2/;
        print "--> $_";
}

##</code><code>##

  HEADER:
    while (my $line = <STDIN>)  {
        print "--> $line";
        last HEADER
            if '2' eq substr $line, 0, 1;
        print "--> $line";
}

##</code><code>##

    process_file_header();
    process_file_participants_list();
    process_file_contract_details();

##</code><code>##

given (determine_context()) {
    when ( $FOO ) { process_foo(); }
    when ( $BAR ) { its_a_bar(); }
    when ( $BAZ ) { woo_ha(); }
    default { confused(); }
}