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