 12
                            
                                        12              
                            
                            
                     
                                                 9               
                            
                                        3D ture
                            
                                        9               
                            
                                        3D ture
                            
                     
                                                 3
                            
                                        3               
                            
                            
                     
                                                 1
                            
                                        1               
                            
                            
                     
                                                 8
                            
                                        8               
                            
                            
                     
                                                 4
                            
                                        4               
                            
                            
                     
                                                 
                                                 3
                            
                                        3               
                            
                            
                     
                                                 12
                            
                                        12              
                            
                            
                     
                                                 8
                            
                                        8               
                            
                            
                    