                                  
                                   6   23   9                                                                                     
                                                                                            
 
                           
 
                          
 
                                   
 
 
             
 
                     
 
                    
 
                       
 
                     
 
                      
 
                       
 
                   
 
                    
 
                    
 
                        
 
                        
 
                      

            