D 5
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                4
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                3
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                1
                                            
                                            
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                    5.
                                            
                                            A 5
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                2
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                1
                                            
                                            
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            C 5
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                4
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                3
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                1
                                            
                                            
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            G 5
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                
                                                    
                                                        x
                                                    
                                                
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                4
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                3
                                            
                                            
                                                
                                                    
                                                        
                                                    
                                                
                                                                1