16              
                            
                            
                    
                            
                                        14              
                            
                            
                    
                            
                                        16              
                            
                            
                    
                            
                                        20              
                            
                            
                    
                            
                                        7               
                            
                            
                    
                            
                                        6               
                            
                            
                    
                            
                                        20              
                            
                            
                    
                            
                                        1               
                            
                            
                    
                            
                                        1               
                            
                            
                    
                            
                                        17              
                            
                            
                    
                            
                                        4               
                            
                            
                    
                            
                                        6               
                            
                            
                    
                            
                                        20              
                            
                            
                    
                            
                                        5               
                            
                            
                    
                            
                                        4               
                            
                            
                    
                            
                                        9               
                            
                            
                    
                            
                                        20              
                            
                                        3D ture
                            
                    
                            
                                        3               
                            
                            
                    
                            
                                        2               
                            
                            
                    
                            
                                        9