 9
                            
                                        9               
                            
                            
                     
                                                 8               
                            
                                        3D ture
                            
                                        8               
                            
                                        3D ture
                            
                     
                                                 6
                            
                                        6               
                            
                            
                     
                                                 20
                            
                                        20              
                            
                            
                     
                                                 8               
                            
                                        3D ture
                            
                                        8               
                            
                                        3D ture
                            
                    