%hash1 = (
          red => 1,
          brown => (
                    green => 1,
                    blue => (
                             yellow => 1,
                            ),
                    black => 1,
                   ),
          gray => 1,
         );

%hash2 = (
          white => 1,
          brown => (
                    purple => 1,
                   ),
         );