.
                                  F
                          r­     r e       r
                       e        n c         e
                      n         ch           n
                      c       V      a         c
                      h       n      i         h
                       V       l      l         V
                        a         a           a
                          n       F        n
                             i      r       i    
                               la  e  all    
                                    n
              ­                      c
                                    h