 20
                            
                                        20              
                            
                            
                     
                                                 20
                            
                                        20              
                            
                            
                     
                                                 9
                            
                                        9               
                            
                            
                     
                                                 12
                            
                                        12              
                            
                            
                     
                                                 9
                            
                                        9               
                            
                            
                     
                                                 18
                            
                                        18              
                            
                            
                     
                                                 17
                            
                                        17              
                            
                            
                     
                                                 18
                            
                                        18              
                            
                            
                     
                                                 20              
                            
                                        3D ture
                            
                                        20              
                            
                                        3D ture
                            
                     
                                                 8
                            
                                        8               
                            
                            
                     
                                                 18
                            
                                        18              
                            
                            
                     
                                                 16
                            
                                        16              
                            
                            
                    