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  1. or download this
    $ perl -e '
    > sub printVariables
    ...
    mike
    ##########
    $
    
  2. or download this
    chomp $line;
    
  3. or download this
    ... die "Can't open file " . $out_file . "\n$!\n";
    
  4. or download this
    ... die "Can't open file $out_file\n$!\n";