                                                                                                       128                              
    64     
                               
               
             
                     
                  
                     
                 
               
                
               
                      
               
                 
             
                   
                     
                    
              
                   
            
             
              
                   
                    
                        
                      
                 
                    
                        
                  
              
                
                  
   32     
                  
               
             
                     
                
                
                
               
              
                     
                
                
               
              
             
             
             
       16        
                  
                
          
                     
                     
                
                           
             
            
   8     
                   
             
                  
                 
            
    4     
                   
                    
             
          
            