iiiiiiiiiiiiiiiiii     
      1tfffffffffffffff1     
      1fLLLLLLLLLLLLLLLt     
      1fLLLtttttttttttt1     
      ifLLL1iiiiiiiiiiii     
      ifLLL1iiiiiiiiii       
      ifLLL1iiiiiiiiii       
      ifLLLfttttttttti       
      ifLLLLLLLLLLLLf1       
      ifffft111111111i       
      iffff1iiiiiiiiii       
      iffff1                 
      itfff1                 
      itfffi                 
      itfffi                 
      i1111i                 
      iiiiii