?? ???????????
????:1??????v:??????
2???????
3?????sn??
4?????11???
5????????
??????(?????????????)??? ????????????? ??? ????(?)????? ????? ? ????(?)??? ????? ????????????? ????(?????)? ????? ? ??????(???)????? ??? ????? ??????(??)? ????????????? ????? ??????????????(?????????????)????? ? ????? ??????????????(?)????? ? ????? ??????:??????????????