2?21???????,?(?)????????????? ? ? 2?21?,????? ????? ? 2?21?,??????????????????????(?????)??? ??? ? 2?21?,??? ??????? ?????????? 2???????????????21???,??????? ????? ??? 2?21???,????????? ??? ? 2?????21?????,?????(?)??????????????? ?????????? ? 2?????21?,?????? ??? ? ???????????????:???????????

??

??:???????????,??????????,??????????????