-er -ey eee eer eex eey eie eii eir eiu eix ere eri err eru ery eu- eue eui eur eux ex- exe exi exr exu exx exy eye eyr ie- iee iei ier iex iey iie iii iir iiu iix ir- ire iri irr iru irx iry iu- iue iui iur ixe ixi ixy iye iyr iyy re- ree rei rer reu rex rey rie rii rir rix riy rri rrr rru rue rui rur ruu rux ruy rxr ry- rye ryr ryu ryy uee uei uer uey uie uii uir uiu ur- ure uri urr uru urx ury uue uur uuu uxr uxu uyi uyu xee xer xeu xex xie xii xiu xix xrx xry xue xui xxi xxx xxy xyr xyy yee yei yer yex yey yie yii yir yre yru yue yui yur yuu yux yuy yxe yxy yye yyu yyy