 
  
 
                             
                             
                             
                             
                             
                        | 9 | 0 | 6 | 5 | 
| 0 | 3 | 1 | 6 | 
| 6 | 8 | 7 | 4 | 
| 2 | 6 | 1 | 0 | 
 
                         
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                         
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                         
                                 
                                 
                                 
                                 
                                 
                         
                                 
                         
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                                 
                         
                                 
                                 
                                