Pat  A                                                  Pat  B

                    
Pat  C                                                                     Pat  D

                    
Pat  E                                                          Pat  F

                          
Pat  G                                              Pat  H

       
Pat  I

                               
Pat J                                                               Pat  K

                                             
Pat L                                    Pat  M                                                 Pay  N

                                 
Pat  O                                                                   Pat  P

                  
Pat  Q                                                                Pat  R

          
Pat  S                                                            Pat  T

                       
Pat  U                                                                   Pat  V

                              
Pat  W                                                             Pat  X     

                   
Pat  Y                                                                Pat   Z