-er -ey eee eek eeo eep eer ees eet eex eey eie eii eik eio eip eir eis eit eix eke eki eko ekp ekr eks ekt eky eo- eoe eoi eok eoo eop eor eos eot ep- epe epi epo epp epr eps ept epx ere eri erk ero erp err ers ert ery es- ese esi esk eso esp esr ess est esx esy ete eti etk 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 iek iep ier ies iet iex iey iie iii iio iip iir iis iit iix ike iki ikk iko ikr iks ikt ikx io- ioe ioi ioo iop ior ios iot ipe ipi ipo ipp ipr ips ipt ipx ipy ir- ire iri irk iro irp irr irs irt irx iry is- ise isi isk iso isp isr iss ist isy ite iti itk ito itp its itt itx ity ixe ixi ixy iye iyo iyr iys iyt iyy k-t ke- kee kei kek keo kep ker kes ket kex key kie kii kik kio kip kir kis kit kix kke kki kkk kkp kkr kks kkt kky koe koi kok koo kop kor kos kot koy kpe kpi kpk kpo kpp kpr kps kpt kri krk kro krp krr krs krt kry kse ksi ksk kso ksp ksr kss kst kte ktk kto ktp ktr kts ktt kxo kxy kye kyo kyp kyr kys kyt kyx o-i oee oei oeo oep oer oes oet oex oey oie oii oik oio oip oir ois oit oke oki okk oko okp okr oks oo- ooi ook ooo oop oor oos oot oox op- ope opi opk opo opp opr ops opt opx opy or- ore ori ork oro orp orr ors ort orx ory os- ose osi osk oso osp osr oss ost osx ot- ote oti otk oto otp otr ots ott ox- oxi oxo oxt oxx oxy oye oyi oyo oys p-p pee pei pek peo pep per pes pet pex pey pie pii pik pio pip pir pis pit pix pke pki pko pkp pkr pks pkt pky poe poi pok poo pop por pos pot pox poy ppe ppi ppk ppo ppp ppr pps ppt ppx pre pri prk pro prp prr prs prt prx pry ps- pse psi psk pso psp psr pss pst psx psy pt- pte pti ptk pto ptp ptr pts ptt ptx pty pxe pxk pxr pxs pxt py- pye pyk pyo pyr pys pyt pyx re- ree rei rek reo rep rer res ret rex rey rie rii rik rio rip rir ris rit rix riy rke rkk rko rkp rks rkt rky roe roi rok roo rop ror ros rot rox roy rpe rpi rpk rpo rpp rpr rps rpt rpx rri rrk rrp rrr rrs rrt rse rsi rsk rso rsp rsr rss rst rsx rte rti rtk rto rtp rtr rts rtt rtx rty rxp rxr rxs ry- rye ryk ryo ryr rys ryy se- see sei sek seo sep ser ses set sex sey sie sii sik sio sip sir sis sit six sk- ske ski skk sko skp skr sks skt skx sky soe soi sok soo sop sor sos sot sox soy spe spi spk spo spp spr sps spt spx spy sr- sre sri srk sro srp srr srs srt srx sry ss- sse ssi ssk sso ssp ssr sss sst ssx ste sti stk sto stp str sts stt stx sty sxi sxs sxt sy- sye syi syk syp syr sys syt syx t-x te- tee tei tek teo tep ter tes tet tex tey tie tii tik tio tip tir tis tit tix tiy tke tkk tko tkp tkr tks tkt tky to- toe toi tok too top tor tos tot tox toy tpe tpi tpk tpo tpp tpr tps tpt tpx tre tri trk tro trp trr trs trt trx try tse tsi tsk tso tsp tsr tss tst tsx tsy tte tti ttk tto ttp ttr tts ttt ttx tty txe txi txk txs txt tye tyo typ tyr tys tyt xee xep xer xes xet xex xie xii xio xis xit xix xke xks xoi xok 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 yek yeo yep yer yes yet yex yey yie yii yio yip yir yis yit yki ykk yoe yoi yok yoo yop yor yos yot yox yoy ypo yps yre yro yrp yrs yrt yse ysi ysk yso ysp ysr yss yst ysy yte ytk yto ytp ytr yts ytt yxe yxy yye yys yyt yyy