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  1. or download this
    #! perl
    use Modern::Perl;
    ...
    ('a' x 100) =~ /(?<match>(??{'(.)' x 100}))/;
    
    say $+{match};
    
  2. or download this
    12:28 >perl 504_SoPW.pl
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    +aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    
    12:28 >