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  1. or download this
                 Rate  find_path       solo find_path2  transform
    find_path  5.91/s         --       -62%       -75%       -97%
    solo       15.7/s       166%         --       -35%       -92%
    find_path2 24.1/s       308%        53%         --       -87%
    transform   188/s      3084%      1097%       681%         --
    
  2. or download this
      for my $letter ( 'a'..'z' ) {