3493* +xi{ɪH Mʱɪ +fɨx * ʴɺɰ Sx MɱS **1** **w*** iS {ɪ Z Mi E{ɳ * M =]ɴɳ vxEɳ **w** b = Vɽ hiɱ i * ɮh i +ɱ M **2** iE h Vi ɴE * `ɪ S +iɮ r i **3**


Oliұ MS +M Oliұ {fS +M +MS +vɪ