-er -ey eee eeo eer ees eex eey eo- eoe eoo eor eos eou ere ero err ers eru ery es- ese eso esr ess esu esx esy eu- eue eur eus eux ex- exe exo exr exs exu exx exy eye eyo eyr eys oee oeo oer oes oex oey oo- ooo oor oos oox or- ore oro orr ors oru orx ory os- ose oso osr oss osu osx ou- oue ouo our ous ox- oxo oxx oxy oye oyo oys re- ree reo rer res reu rex rey roe roo ror ros rou rox roy rrr rrs rru rse rso rsr rss rsu rsx rue ruo rur rus ruu rux ruy rxr rxs ry- rye ryo ryr rys ryu ryy se- see seo ser ses seu sex sey soe soo sor sos sou sox soy sr- sre sro srr srs srx sry ss- sse sso ssr sss ssu ssx sue suo sur sus suu sux suy sxs sxu sy- sye syr sys syu syx uee uer ues uey uoe uoo uor uos uox ur- ure uro urr urs uru urx ury use uso usr uss usu usx uue uur uus uuu uxo uxr uxu uyo uys uyu xee xer xes xeu xex xoo xor xos xox xrx xry xss xue xus xxo xxx xxy xyr xyy yee yeo yer yes yex yey yoe yoo yor yos you yox yoy yre yro yrs yru yse yso ysr yss ysu ysy yue yuo yur yus yuu yux yuy yxe yxy yye yys yyu yyy