        

                             

           

                                                                                                                                                                   
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

       

                                                                                                                                                                                                                                                                         0  1        1  3        4  6        7  12      13  15       16                                                                                                                                  
                                                                                                                                                                                                                     
                  0  6   0  8    0  12               
     
     1            
     2          
     3               
     4            
     5            

                                                      

             

                                                                                                                                                                                                                                   
              

                                                                                                                                                                                      
              

                                                                                                                
                

                                                                                                                                                                                                                                                                                                                                      
                 

                                                                                                                                                                          
                

        

                                                                                                   0  3        4  6                         

           

                                                                                                          
                                                                                    

                 
        

               
             


                 