1                     64                                     5 ~ 8                              9 ~16      
    
     2                                 
    
     3                                       5 ~ 8       
    
     4                           5 ~ 8                                                   
      
     5                                 
    
     6                                                  
    
      7                             
 
      8                                                  5 ~ 8    
 
     9                          
 
      10                      
 
     11                            
 
     12               
 
     13                