 
                             
                             
                             
                             
                        | 1 | 4 | 5 | 1 | 
| 5 | 7 | 7 | 3 | 
| 6 | 0 | 3 | 1 | 
| 0 | 4 | 8 | 9 | 
 
                         
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                         
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                         
                                 
                                 
                                 
                                 
                                 
                         
                                 
                         
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                         
                                 
                                 
                                