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