???????? ????, Opt for ??????? ??????????, ??? ?????????? class, ??????? ?????????????? ???? ??? ??????????? class ??????????????. ????????? ??????? ???? ??? ?????????? ??????? ?????? ?????????? ??????????? ???????? ???????? ???????? ???? ????? ????????????? ?????? ????? ?????? ???.????????? ?????????????? ????? ?????? ????? ?????? (37)}