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  1. or download this
    c:\@Work\Perl\monks>perl -wMstrict -le
    "my $s1 = 'foobarfeefiefoefum';
    ...
    B: pos in $s2 '123456789' after successful match == 6
    C: pos in $s1 'foobarfeefiefoefum' after successful match == 15
    D: pos in $s2 '123456789' still == 6