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    $_ = "_";
    print;
    ...
    print .''.tr/u/s/;
    print .tr/s/t/;
    print .tr/t/ /;
    
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    # declare some protos so we can call the subs J A P and H
    # without an & prefix or () suffix -> ie as barewords.
    ...
          H;e:y:e:r:.
          H;r:y:r:_:. # final transformation changes $_ to '_'
          print;exit} # so we print symetrical '_' and exit