?? ??? ??? ????? ????? ??????????. ?????? ????????? ???? ????? ?? *?????? ??????? ????? ????? ?????? ???? ??? ????? ????? ???? ???? ??????? ??? ?????: ?? ???? ????? ??? ???? ??????? ???? ??? A B C ?? ??? ???? ??? ??? ????? ?????? ?????? ???????? ?????? A ?????? ????? ???????? ?????? B ?????? ?????? ??????? ?????? C ??????