 16              
                            
                                        3D ture
                            
                                        16              
                            
                                        3D ture
                            
                     
                                                 20              
                            
                                        3D ture
                            
                                        20              
                            
                                        3D ture
                            
                     
                                                 16              
                            
                                        3D ture
                            
                                        16              
                            
                                        3D ture
                            
                     
                                                 13
                            
                                        13              
                            
                            
                    