A                        B                       C

          D

                         E

                      F                      G

          H

                    CH             

          I                       J             

         K

              L

                    M                           N    

        O              

         P

                      Q             

          R                              

                         S                                      

       T

                    U                                                         

        V                                    W                    

          X           

         Y                          

        Z