-er -ey eee eef eek eer ees eet eey ef- efe eff efr efs eft eke ekf ekr eks ekt eky ere erf erk err ers ert ery es- ese esf esk esr ess est esy ete etf etk etr ets ett ety eye eyr eys eyt fee fef fek fer fes fet fey ffe fff ffk ffr ffs fft ffy fkf fkk fkt fre frf frk frr frs frt fry fse fsf fsk fsr fss fst fte ftf ftk ftr fts ftt fty fy- fye fyk k-t ke- kee kef kek ker kes ket key kff kfs kke kkk kkr kks kkt kky krf krk krr krs krt kry kse ksf ksk ksr kss kst kte ktf ktk ktr kts ktt kye kyr kys kyt re- ree ref rek rer res ret rey rfe rff rfk rfr rfs rft rke rkf rkk rks rkt rky rrf rrk rrr rrs rrt rse rsf rsk rsr rss rst rte rtf rtk rtr rts rtt rty ry- rye ryf ryk ryr rys ryy se- see sef sek ser ses set sey sfe sff sfk sfr sfs sft sk- ske skf skk skr sks skt sky sr- sre srf srk srr srs srt sry ss- sse ssf ssk ssr sss sst ste stf stk str sts stt sty sy- sye syk syr sys syt te- tee tef tek ter tes tet tey tfe tff tfk tfr tfs tft tke tkk tkr tks tkt tky tre trf trk trr trs trt try tse tsf tsk tsr tss tst tsy tte ttf ttk ttr tts ttt tty tye tyf tyr tys tyt yee yef yek yer yes yet yey yfe yff yfr yfs yft ykk yre yrf yrs yrt yse ysk ysr yss yst ysy yte ytf ytk ytr yts ytt yye yyf yys yyt yyy