 
                             
                             
                             
                             
                             
                         
                                                | 1 | 6 | 4 | 4 | 
 
                                                | 5 | 3 | 2 | 0 | 
 
                                                | 6 | 8 | 9 | 1 | 
 
                                                | 3 | 4 | 2 | 0 | 
 
                         
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                         
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                         
                                 
                                 
                                 
                                 
                                 
                         
                                 
                         
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                         
                                 
                                 
                                