 7
                            
                                        7               
                            
                            
                     
                                                 20              
                            
                                        3D ture
                            
                                        20              
                            
                                        3D ture
                            
                     
                                                 28
                            
                                        28              
                            
                            
                     
                                                 19
                            
                                        19              
                            
                            
                     
                                                 18              
                            
                                        3D ture
                            
                                        18              
                            
                                        3D ture
                            
                     
                                                 7               
                            
                                        3D ture
                            
                                        7               
                            
                                        3D ture
                            
                     
                                                 20
                            
                                        20              
                            
                            
                     
                                                 1
                            
                                        1               
                            
                            
                     
                                                 20
                            
                                        20              
                            
                            
                    