-er a-a a-i a-t aaa aae aai aap aar aas aat aax aea aee aei aep aer aes aet aex ai- aia aie aii aip air ais ait aix ap- apa ape api app apr aps apt apx ar- ara are ari arp arr ars art arx as- asa ase asi asp asr ass ast asx at- ata ate ati atp atr ats att atx ax- axa axe axi axp axr axs axt axx eaa eae eai eap ear eas eat eax eea eee eep eer ees eet eex eia eie eii eip eir eis eit eix ep- epa epe epi epp epr eps ept epx era ere eri erp err ers ert es- esa ese esi esp esr ess est esx eta ete eti etp etr ets ett etx ex- exa exe exi exp exr exs ext exx ia- iaa iae iai iap iar ias iat ie- iea iee iei iep ier ies iet iex iia iie iii iip iir iis iit iix ipa ipe ipi ipp ipr ips ipt ipx ir- ira ire iri irp irr irs irt irx is- isa ise isi isp isr iss ist ita ite iti itp its itt itx ixe ixi p-p paa pae pai pap par pas pat pax pea pee pei pep per pes pet pex pia pie pii pip pir pis pit pix ppa ppe ppi ppp ppr pps ppt ppx pra pre pri prp prr prs prt prx ps- psa pse psi psp psr pss pst psx pt- pta pte pti ptp ptr pts ptt ptx pxe pxr pxs pxt ra- raa rae rai rap rar ras rat rax re- rea ree rei rep rer res ret rex ria rie rii rip rir ris rit rix rpa rpe rpi rpp rpr rps rpt rpx rra rri rrp rrr rrs rrt rsa rse rsi rsp rsr rss rst rsx rta rte rti rtp rtr rts rtt rtx rxp rxr rxs saa sae sai sap sar sas sat sax se- sea see sei sep ser ses set sex sia sie sii sip sir sis sit six spa spe spi spp spr sps spt spx sr- sra sre sri srp srr srs srt srx ss- ssa sse ssi ssp ssr sss sst ssx sta ste sti stp str sts stt stx sxi sxs sxt t-x taa tae tai tap tar tas tat tax te- tea tee tei tep ter tes tet tex tia tie tii tip tir tis tit tix tpa tpe tpi tpp tpr tps tpt tpx tra tre tri trp trr trs trt trx tsa tse tsi tsp tsr tss tst tsx tta tte tti ttp ttr tts ttt ttx txe txi txs txt xaa xap xar xas xat xee xep xer xes xet xex xia xie xii xis xit xix xpa xpe xpp xps xpt xrt xrx xsa xsi xsp xss xst xti xtp xtr xts xtx xxi xxp xxx