 16
                            
                                        16              
                            
                            
                     
                                                 13
                            
                                        13              
                            
                            
                     
                                                 1
                            
                                        1               
                            
                            
                     
                                                 20              
                            
                                        3D ture
                            
                                        20              
                            
                                        3D ture
                            
                     
                                                 20              
                            
                                        3D ture
                            
                                        20              
                            
                                        3D ture
                            
                     
                                                 4
                            
                                        4               
                            
                            
                    