111111                  
     tffff1                  
     tLLLf1                  
     tLLLf1                  
     tLLLf1                  
     tLLLf1                  
     tLLLfi                  
     tLLLfi                  
     tLLLfi                  
     tffffi                  
     tffffi                  
     tffffiiiiiiiiiiiiii     
     tffffiiiiiiiiiiiiii     
     1ffffttttttttttttti     
     1fffffffffffffffffi     
     i11111111111111111i     
     iiiiiiiiiiiiiiiiiii