-er -ey eee eef eem eer eet eey ef- efe eff efm efr eft em- eme emf emm emr emt ere erf erm err ert ery ete etf etm etr ett ety eye eym eyr eyt fee fef fem fer fet fey ffe fff ffm ffr fft ffy fme fmf fmm fmr fmt fre frf frm frr frt fry fte ftf ftm ftr ftt fty fy- fye m-f m-r mee mef mem mer met mey mfe mff mfm mfr mft mfy mme mmf mmm mmr mmt mre mrf mrm mrr mrt mry mte mtf mtm mtr mtt my- mye myf mym myr myt re- ree ref rem rer ret rey rfe rff rfm rfr rft rme rmf rmm rmr rmt rrf rrm rrr rrt rte rtf rtm rtr rtt rty ry- rye ryf rym ryr ryy te- tee tef tem ter tet tey tfe tff tfm tfr tft tme tmf tmm tmr tmt tmy tre trf trm trr trt try tte ttf ttm ttr ttt tty tye tyf tym tyr tyt yee yef yem yer yet yey yfe yff yfm yfr yft yme ymm ymt yre yrf yrt yte ytf ytm ytr ytt yye yyf yyt yyy