-er -ey eee eeo eep eer ees eet eex eey eie eii eio eip eir eis eit eix eo- eoe eoi eoo eop eor eos eot ep- epe epi epo epp epr eps ept epx ere eri ero erp err ers ert ery es- ese esi eso esp esr ess est esx esy ete eti eto etp etr ets ett etx ety ex- exe exi exo exp exr exs ext exx exy eye eyo eyp eyr eys eyt ie- iee iei iep ier ies iet iex iey iie iii iio iip iir iis iit iix io- ioe ioi ioo iop ior ios iot ipe ipi ipo ipp ipr ips ipt ipx ipy ir- ire iri iro irp irr irs irt irx iry is- ise isi iso isp isr iss ist isy ite iti ito itp its itt itx ity ixe ixi ixy iye iyo iyr iys iyt iyy o-i oee oei oeo oep oer oes oet oex oey oie oii oio oip oir ois oit oo- ooi ooo oop oor oos oot oox op- ope opi opo opp opr ops opt opx opy or- ore ori oro orp orr ors ort orx ory os- ose osi oso osp osr oss ost osx ot- ote oti oto otp otr ots ott ox- oxi oxo oxt oxx oxy oye oyi oyo oys p-p pee pei peo pep per pes pet pex pey pie pii pio pip pir pis pit pix poe poi poo pop por pos pot pox poy ppe ppi ppo ppp ppr pps ppt ppx pre pri pro prp prr prs prt prx pry ps- pse psi pso psp psr pss pst psx psy pt- pte pti pto ptp ptr pts ptt ptx pty pxe pxr pxs pxt py- pye pyo pyr pys pyt pyx re- ree rei reo rep rer res ret rex rey rie rii rio rip rir ris rit rix riy roe roi roo rop ror ros rot rox roy rpe rpi rpo rpp rpr rps rpt rpx rri rrp rrr rrs rrt rse rsi rso rsp rsr rss rst rsx rte rti rto rtp rtr rts rtt rtx rty rxp rxr rxs ry- rye ryo ryr rys ryy se- see sei seo sep ser ses set sex sey sie sii sio sip sir sis sit six soe soi soo sop sor sos sot sox soy spe spi spo spp spr sps spt spx spy sr- sre sri sro srp srr srs srt srx sry ss- sse ssi sso ssp ssr sss sst ssx ste sti sto stp str sts stt stx sty sxi sxs sxt sy- sye syi syp syr sys syt syx t-x te- tee tei teo tep ter tes tet tex tey tie tii tio tip tir tis tit tix tiy to- toe toi too top tor tos tot tox toy tpe tpi tpo tpp tpr tps tpt tpx tre tri tro trp trr trs trt trx try tse tsi tso tsp tsr tss tst tsx tsy tte tti tto ttp ttr tts ttt ttx tty txe txi txs txt tye tyo typ tyr tys tyt xee xep xer xes xet xex xie xii xio xis xit xix xoi xoo xop xor xos xot xox xpe xpo xpp xps xpt xrt xrx xry xsi xsp xss xst xti xtp xtr xts xtx xty xxi xxo xxp xxx xxy xyp xyr xyy yee yei yeo yep yer yes yet yex yey yie yii yio yip yir yis yit yoe yoi yoo yop yor yos yot yox yoy ypo yps yre yro yrp yrs yrt yse ysi yso ysp ysr yss yst ysy yte yto ytp ytr yts ytt yxe yxy yye yys yyt yyy