-er -ey eee eef eer ees eey ef- efe eff efr efs ere erf err ers eru ery es- ese esf esr ess esu esy eu- eue euf eur eus eye eyr eys fee fef fer fes feu fey ffe fff ffr ffs ffu ffy fre frf frr frs fru fry fse fsf fsr fss fsu fue fuf fur fus fuu fy- fye re- ree ref rer res reu rey rfe rff rfr rfs rfu rrf rrr rrs rru rse rsf rsr rss rsu rue ruf rur rus ruu ruy ry- rye ryf ryr rys ryu ryy se- see sef ser ses seu sey sfe sff sfr sfs sfu sr- sre srf srr srs sry ss- sse ssf ssr sss ssu sue suf sur sus suu suy sy- sye syr sys syu uee uef uer ues uey ufe uff ufr ufs ufu ur- ure urf urr urs uru ury use usf usr uss usu uue uur uus uuu uys uyu yee yef yer yes yey yfe yff yfr yfs yfu yre yrf yrs yru yse ysr yss ysu ysy yue yur yus yuu yuy yye yyf yys yyu yyy