.
                          simple s
                      imple simple
                    simple   simple
                   simple  simple  s
                      simple simple  
                      simple simple
                      simple simple
                      simple simple
                      simple simple
                      simple simple
                      simple simple
                      simple simple
                      simple simple
                      simple simple
                      simple simple
                      simple simple
                      simple simple
          simple simple     simple simple
       simple simple si  mple  simple   si
      simple simple  s   imple simple sim
       simple simple        simple simple
             simple                      simple