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  1. or download this
      # a negative number indicates how many chars you just matched
      a -> p -> p -> l -> e -> -5 
    ...
        -> l -> o -> s -> s -> o -> m -> -7
                  -> u -> s -> e -> -6
      u -> s -> e -> -3
    
  2. or download this
    #!/usr/bin/perl -w
    use strict;
    ...
    bar
    bee
    beetle