.
                                       K
                                M  a  u  M
                            i         f   K        i
                         c           a   u            c
                       h               f                 h
                     M               K                 M
                      i                 a                    i
                    c                  u  ­                  c
                    h                  f     ­                h
                    M              K    a                M
                     i               u       f               i
                       c             K      a              c
                        h             u    f             h
                         M              K            M
                             i             a           i
                                 c        u        c
                                     h    f     h
                                           K
                                            a
                                            u
                                            F