21                               22                                          23
                            



                       24                              25                                        26
                          

                    27                                        28                                        29                    
                        
                            


                     30                                         31                                      32
           
          

                      33                                              34                                                   35
   
                                                      
                                                                                                                              38
                              36                                       37                                                                            

       
                     39