_                                                                
                    1 :  0 , 0 1 0 1 1 0 1 1 0 ...     0   ==>   1                                                      
                            -1-                                                                                         
                                                       _                                                                
                    2 :  0 , 1 1 0 1 1 0 0 0 1 ...     1   ==>     0                                                    
                              -2-                                                                                       
                                                       _                                                                
                    3 :  0 , 0 0 1 1 0 1 1 0 0 ...     1   ==>       0                                                  
                                -3-                                                                                     
                                                       _                                                                
                    4 :  0 , 1 0 0 0 1 1 1 1 0 ...     0   ==>         1                                                
                                  -4-                                                                                   
                                                       _                                                                
                    5 :  0 , 0 1 1 1 0 0 1 0 0 ...     0   ==>           1                                              
                                    -5-                                                                                 
                                                       _                                                                
                    6 :  0 , 0 0 1 0 1 1 1 1 1 ...     1   ==>             0                                            
                                      -6-                                                                               
                                                       _                                                                
                    7 :  0 , 1 1 0 0 1 0 0 0 1 ...     0   ==>               1                                          
                                        -7-                                                                             
                                                       _                                                                
                    8 :  0 , 0 0 0 1 1 1 1 1 0 ...     1   ==>                 0                                        
                                          -8-                                                                           
                                                                                                                        
                    9 :  0 , 1 1 1 0 0 0 0 1 1 ...                                                                      
                                                                                                                        
                                                                                                                        
                    (...)                                                                                               
                                                                                                                        
                                                                                                                        
                                                                                                                        
                                                                                                                        
                                                                                                                        
                                                                                                                        
 JFC                                                                                                                    
 www.lactamme.polytechnique.fr