????:1?????:??????????

2????????????

3??????????

4???????????

5?????

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