-er a-a a-t aaa aae aak aap aar aas aat aax aea aee aek aep aer aes aet aex aka ake akk akp akr aks ap- apa ape apk app apr aps apt apx ar- ara are ark arp arr ars art arx as- asa ase ask asp asr ass ast asx at- ata ate atp atr ats att atx ax- axa axe axk axp axr axs axt axx eaa eae eak eap ear eas eat eax eea eee eek eep eer ees eet eex eka eke ekp ekr eks ekt ep- epa epe epp epr eps ept epx era ere erk erp err ers ert es- esa ese esk esp esr ess est esx eta ete etk etp etr ets ett etx ex- exa exe exp exr exs ext exx k-t ka- kaa kae kak kap kar kas kat kax ke- kea kee kek kep ker kes ket kex kke kkk kkp kkr kks kkt kpa kpe kpk kpp kpr kps kpt kra krk krp krr krs krt ksa kse ksk ksp ksr kss kst kta kte ktk ktp ktr kts ktt p-p paa pae pak pap par pas pat pax pea pee pek pep per pes pet pex pka pke pkp pkr pks pkt ppa ppe ppk ppp ppr pps ppt ppx pra pre prk prp prr prs prt prx ps- psa pse psk psp psr pss pst psx pt- pta pte ptk ptp ptr pts ptt ptx pxe pxk pxr pxs pxt ra- raa rae rak rap rar ras rat rax re- rea ree rek rep rer res ret rex rke rkk rkp rks rkt rpa rpe rpk rpp rpr rps rpt rpx rra rrk rrp rrr rrs rrt rsa rse rsk rsp rsr rss rst rsx rta rte rtk rtp rtr rts rtt rtx rxp rxr rxs saa sae sak sap sar sas sat sax se- sea see sek sep ser ses set sex sk- ska ske skk skp skr sks skt skx spa spe spk spp spr sps spt spx sr- sra sre srk srp srr srs srt srx ss- ssa sse ssk ssp ssr sss sst ssx sta ste stk stp str sts stt stx sxs sxt t-x taa tae tak tap tar tas tat tax te- tea tee tek tep ter tes tet tex tka tke tkk tkp tkr tks tkt tpa tpe tpk tpp tpr tps tpt tpx tra tre trk trp trr trs trt trx tsa tse tsk tsp tsr tss tst tsx tta tte ttk ttp ttr tts ttt ttx txe txk txs txt xaa xak xap xar xas xat xee xep xer xes xet xex xke xks xpa xpe xpp xps xpt xrt xrx xsa xsp xss xst xtp xtr xts xtx xxp xxx