*****     HANNOY   HP     *****

                    ^                                          ^

                      `                                                     `  

                   _                                                             _

                      a                                                a 

                       b                                          b                            

                   c                                                                      c

               d                                                          d 

                  e                                                      e

•     g                g

 h   h              

i i

 t