???? ????????? ????? ?????? ??? ???? ?????? ??????? ?? ???? ???? ??????? ??? ??? ????? ??? ????. ????? ?????? ???? ????? ???? ?? ??????? ????? ??? ?????? ???? ???? ???? ???? ????? ???????? ?????? ?????? ?? ???? ?????? ?????? - ???????????? - ????? ??????? ???? ?? ??? ?????? ????? ????????? ???? ???? ?????? ???????? ????? ?????. The DFB structure o