{??? a 3-level ?????? ??????????????? ??? in to the Fisher-??????????????????????????? |?????1% ???????{??|??|???|??|?????|????{??|??????|????? 1 ???| |????? 1 ?|???? 1 ?|???? 1 ?|???? 1 ?|???? 1 ?|?????????? — ???????????????????????????? |??? ?? ?????? ??? ????????{??|???|????|??????????????????????????? ?? ?” ???{???|????|????|????|?????????