2017    2  11 
                 
             
128   
   32   
                                 
                         
                            
                        
                                 
                                
                               
                        
                       
                               
                      
                       
                            
                               
                                
                                   

  16   
                                
                                
                                 
                     
                                  
                               
                       
                               

  8    
                                 
                                
                      
                              

 4   
                              
                      
    
                     

    
           