-er -ey eee eer ees eet eex eey ere err ers ert ery es- ese esr ess est esx esy ete etr ets ett etx ety ex- exe exr exs ext exx exy eye eyr eys eyt re- ree rer res ret rex rey rrr rrs rrt rse rsr rss rst rsx rte rtr rts rtt rtx rty rxr rxs ry- rye ryr rys ryy se- see ser ses set sex sey sr- sre srr srs srt srx sry ss- sse ssr sss sst ssx ste str sts stt stx sty sxs sxt sy- sye syr sys syt syx t-x te- tee ter tes tet tex tey tre trr trs trt trx try tse tsr tss tst tsx tsy tte ttr tts ttt ttx tty txe txs txt tye tyr tys tyt xee xer xes xet xex xrt xrx xry xss xst xtr xts xtx xty xxx xxy xyr xyy yee yer yes yet yex yey yre yrs yrt yse ysr yss yst ysy yte ytr yts ytt yxe yxy yye yys yyt yyy