          2021   7  4                 128                       
        8                           
    
                   32                    
    
                    32                       
   
                     64                       
   
             2021   7  3                  128                                  8       
                                           
           
             5  23                 128                            
        8                    
    
             5  23             32                      
         8                         
                                                   
  
                 