-er a-a a-i a-t aaa aae aai aao aap aar aas aat aax aea aee aei aeo aep aer aes aet aex ai- aia aie aii aio aip air ais ait aix aoa aoe aoi aoo aop aor aos aot aox ap- apa ape api apo app apr aps apt apx ar- ara are ari aro arp arr ars art arx as- asa ase asi aso asp asr ass ast asx at- ata ate ati ato atp atr ats att atx ax- axa axe axi axo axp axr axs axt axx eaa eae eai eao eap ear eas eat eax eea eee eeo eep eer ees eet eex eia eie eii eio eip eir eis eit eix eo- eoa eoe eoi eoo eop eor eos eot ep- epa epe epi epo epp epr eps ept epx era ere eri ero erp err ers ert es- esa ese esi eso esp esr ess est esx eta ete eti eto etp etr ets ett etx ex- exa exe exi exo exp exr exs ext exx ia- iaa iae iai iao iap iar ias iat ie- iea iee iei iep ier ies iet iex iia iie iii iio iip iir iis iit iix io- ioa ioe ioi ioo iop ior ios iot ipa ipe ipi ipo ipp ipr ips ipt ipx ir- ira ire iri iro irp irr irs irt irx is- isa ise isi iso isp isr iss ist ita ite iti ito itp its itt itx ixe ixi o-i oaa oae oai oao oap oar oas oat oax oea oee oei oeo oep oer oes oet oex oia oie oii oio oip oir ois oit oo- ooa ooi ooo oop oor oos oot oox op- opa ope opi opo opp opr ops opt opx or- ora ore ori oro orp orr ors ort orx os- osa ose osi oso osp osr oss ost osx ot- ota ote oti oto otp otr ots ott ox- oxa oxi oxo oxt oxx p-p paa pae pai pao pap par pas pat pax pea pee pei peo pep per pes pet pex pia pie pii pio pip pir pis pit pix poa poe poi poo pop por pos pot pox ppa ppe ppi ppo ppp ppr pps ppt ppx pra pre pri pro prp prr prs prt prx ps- psa pse psi pso psp psr pss pst psx pt- pta pte pti pto ptp ptr pts ptt ptx pxe pxr pxs pxt ra- raa rae rai rao rap rar ras rat rax re- rea ree rei reo rep rer res ret rex ria rie rii rio rip rir ris rit rix roa roe roi roo rop ror ros rot rox rpa rpe rpi rpo rpp rpr rps rpt rpx rra rri rrp rrr rrs rrt rsa rse rsi rso rsp rsr rss rst rsx rta rte rti rto rtp rtr rts rtt rtx rxp rxr rxs saa sae sai sao sap sar sas sat sax se- sea see sei seo sep ser ses set sex sia sie sii sio sip sir sis sit six soa soe soi soo sop sor sos sot sox spa spe spi spo spp spr sps spt spx sr- sra sre sri sro srp srr srs srt srx ss- ssa sse ssi sso ssp ssr sss sst ssx sta ste sti sto stp str sts stt stx sxi sxs sxt t-x taa tae tai tao tap tar tas tat tax te- tea tee tei teo tep ter tes tet tex tia tie tii tio tip tir tis tit tix to- toa toe toi too top tor tos tot tox tpa tpe tpi tpo tpp tpr tps tpt tpx tra tre tri tro trp trr trs trt trx tsa tse tsi tso tsp tsr tss tst tsx tta tte tti tto ttp ttr tts ttt ttx txe txi txs txt xaa xap xar xas xat xee xep xer xes xet xex xia xie xii xio xis xit xix xoa xoi xoo xop xor xos xot xox xpa xpe xpo xpp xps xpt xrt xrx xsa xsi xsp xss xst xti xtp xtr xts xtx xxi xxo xxp xxx