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  1. or download this
    #!/usr/bin/perl
    
    ...
    # following for debug only :)
    system 'more Filer/* output.second.column | cat';
    # because 'more' shows filename and contents when piped
    
  2. or download this
    ::::::::::::::
    Filer/one.txt
    ...
    seventeen
    eight
    eleven