.
                                     r
                         e         ei          e
                      i             nc            i
                    n               a               n
                   c                 r                 c
                   a              n   a              a
                   r              t     e              r
                    e             d    r              e
                     i              e   i              i
                       n             n             n
                         c            c            c
                             a       a        a
                                       r
                                       n
                                       a
                                       t
                                       e