-er -ey eee eep eer ees eet eex eey ep- epe epp epr eps ept epx ere erp err ers ert ery es- ese esp esr ess est esx esy ete etp etr ets ett etx ety ex- exe exp exr exs ext exx exy eye eyp eyr eys eyt p-p pee pep per pes pet pex pey ppe ppp ppr pps ppt ppx pre prp prr prs prt prx pry ps- pse psp psr pss pst psx psy pt- pte ptp ptr pts ptt ptx pty pxe pxr pxs pxt py- pye pyr pys pyt pyx re- ree rep rer res ret rex rey rpe rpp rpr rps rpt rpx rrp rrr rrs rrt rse rsp rsr rss rst rsx rte rtp rtr rts rtt rtx rty rxp rxr rxs ry- rye ryr rys ryy se- see sep ser ses set sex sey spe spp spr sps spt spx spy sr- sre srp srr srs srt srx sry ss- sse ssp ssr sss sst ssx ste stp str sts stt stx sty sxs sxt sy- sye syp syr sys syt syx t-x te- tee tep ter tes tet tex tey tpe tpp tpr tps tpt tpx tre trp trr trs trt trx try tse tsp tsr tss tst tsx tsy tte ttp ttr tts ttt ttx tty txe txs txt tye typ tyr tys tyt xee xep xer xes xet xex xpe xpp xps xpt xrt xrx xry xsp xss xst xtp xtr xts xtx xty xxp xxx xxy xyp xyr xyy yee yep yer yes yet yex yey yps yre yrp yrs yrt yse ysp ysr yss yst ysy yte ytp ytr yts ytt yxe yxy yye yys yyt yyy