?? ????????????????????
????:1???90????????:?????????
2?????????
3????????
4????????
5??????
6?21????????????????,?,?????????????????6???17????????????????,?????5??????????? ??????????? ? 6?????????21???,?,??????????6???17?,???????????????????5???????????????????? ? ? 6??????????????21?,?????????,??????6?????17???,??5?????????????????????????????????????? ? ??????????? 6?21?,?,??6?17??????????????,?????????5??????????????????????????????? ?????????????? ???????????????? 6??????????????????????21?????,?????,????6???17?,????????????????5????? ??? ??????????? 6???????????21?,????6???17???????????????????,???????????5???????????????????????????????????????????? ??? ?????????????????????? ????:????????????