1                               
                                                                        
                                                                        
                                                                        
                                                                        
                                        2                               
                                                                        
                                                 2-5                    
                                                                        
                                                                        
                                        5                               
                                                                        
                                                                        
                                                                        
                                                                        
                                                                        
                                                                        
                                                                        
                                        3                               
                                                                        
                                                                        
                                                                        
                                        4                            4-0
                                                                        
                                                 4-<>                   
                                                                        
                                                                        
                                                                        
                                                                        
                                                                        
                                                                        
                                                 <>-6                   
                                                                        
                                                                        
                                                                        
                                        6