.
                    
                                      C
                              r      ro      r
                           o         co        o
                          c           o            c
                         o           d             o
                         d         i     l          d
                         i          e     c          i
                          l          r   o           l
                           e         c  o          e
                            c          d           c
                              r         i          r
                                o       l       o
                                   c    e    c