-er -ey eee eef eer ees eet eey ef- efe eff efr efs eft ere erf err ers ert ery es- ese esf esr ess est esy ete etf etr ets ett ety eye eyr eys eyt fee fef fer fes fet fey ffe fff ffr ffs fft ffy fre frf frr frs frt fry fse fsf fsr fss fst fte ftf ftr fts ftt fty fy- fye re- ree ref rer res ret rey rfe rff rfr rfs rft rrf rrr rrs rrt rse rsf rsr rss rst rte rtf rtr rts rtt rty ry- rye ryf ryr rys ryy se- see sef ser ses set sey sfe sff sfr sfs sft sr- sre srf srr srs srt sry ss- sse ssf ssr sss sst ste stf str sts stt sty sy- sye syr sys syt te- tee tef ter tes tet tey tfe tff tfr tfs tft tre trf trr trs trt try tse tsf tsr tss tst tsy tte ttf ttr tts ttt tty tye tyf tyr tys tyt yee yef yer yes yet yey yfe yff yfr yfs yft yre yrf yrs yrt yse ysr yss yst ysy yte ytf ytr yts ytt yye yyf yys yyt yyy