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