 17
                            
                                        17              
                            
                            
                     
                                                 13
                            
                                        13              
                            
                            
                     
                                                 19              
                            
                                        3D ture
                            
                                        19              
                            
                                        3D ture
                            
                     
                                                 
                                                 12
                            
                                        12              
                            
                            
                     
                                                 9
                            
                                        9               
                            
                            
                    