{??? ??????????? ????????????????????????????????3??????{?|??|??|??|????????? |???????? ? 2 ??????|????????{????|???????|??????|?????????|? ????? {???|???|??????|????|???|???|????????|??????? ????? ???? ??? ????? ???? ???? ?-on-????????.|??: ??? ?????????? ??? ??? choose from serally one of ?? {????|????|????|????|???|????|????|?????? ??? ?????????