????? ?? ?????????????????? ???? ?? ??? ?? ????? ?? ????????? ??? ???????? ?? ???????????? ?? ?? ??? ??? ????????? ?????? ?? ????????? ????? ?? ??? ?? ??? ????????? ??? ??? ???????????????? ??????????? ? undulating ?????????? ?? ????? ???? ?????? ?????? ?? ???? ?????????/??/?? ???/???/??? ?????????/????/??? {?????????/?????/????? ???? ????