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  1. or download this
    c:\@Work\Perl\monks>perl -wMstrict -le
    "my @SlectedColumns = (9, 7, 6, 0, 5, 0, 4, 3, 2, 0, 1, 9, 9);
    ...
    do something with col 3
    do something with col 2
    do something with col 1
    
  2. or download this
    use constant RX_COMMENT => qr{ ... }xms;
    ...
    ...
        ...
    
        }  # end while LINE