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