?????? A ?-?????? ?? ??????? ????, ?? ?? combined ?? ?????? ????? ?????? ?????? ??????. ????? ????? ?-????? ?? ???????? ???, ???? ????? ????? ???? ????? ?? ???????? ??? ???. ?????? A ???? ??????? ?? ??????, ???, ??????? ??? ??????(B3) ???? ?????? ?? ??????, ?-???} ????? ?-???. ?????? B3 ?????/??????/????? ????????? ??????/ ?????? ?????