-er a-a a-i a-t aaa aae aai aak aar aas aat aax aea aee aei aek aer aes aet aex ai- aia aie aii aik air ais ait aix aka ake aki akk akr aks ar- ara are ari ark arr ars art arx as- asa ase asi ask asr ass ast asx at- ata ate ati atr ats att atx ax- axa axe axi axk axr axs axt axx eaa eae eai eak ear eas eat eax eea eee eek eer ees eet eex eia eie eii eik eir eis eit eix eka eke eki ekr eks ekt era ere eri erk err ers ert es- esa ese esi esk esr ess est esx eta ete eti etk etr ets ett etx ex- exa exe exi exr exs ext exx ia- iaa iae iai iar ias iat ie- iea iee iei iek ier ies iet iex iia iie iii iir iis iit iix ika ike iki ikk ikr iks ikt ikx ir- ira ire iri irk irr irs irt irx is- isa ise isi isk isr iss ist ita ite iti itk its itt itx ixe ixi k-t ka- kaa kae kai kak kar kas kat kax ke- kea kee kei kek ker kes ket kex kia kie kii kik kir kis kit kix kke kki kkk kkr kks kkt kra kri krk krr krs krt ksa kse ksi ksk ksr kss kst kta kte ktk ktr kts ktt ra- raa rae rai rak rar ras rat rax re- rea ree rei rek rer res ret rex ria rie rii rik rir ris rit rix rke rkk rks rkt rra rri rrk rrr rrs rrt rsa rse rsi rsk rsr rss rst rsx rta rte rti rtk rtr rts rtt rtx rxr rxs saa sae sai sak sar sas sat sax se- sea see sei sek ser ses set sex sia sie sii sik sir sis sit six sk- ska ske ski skk skr sks skt skx sr- sra sre sri srk srr srs srt srx ss- ssa sse ssi ssk ssr sss sst ssx sta ste sti stk str sts stt stx sxi sxs sxt t-x taa tae tai tak tar tas tat tax te- tea tee tei tek ter tes tet tex tia tie tii tik tir tis tit tix tka tke tkk tkr tks tkt tra tre tri trk trr trs trt trx tsa tse tsi tsk tsr tss tst tsx tta tte tti ttk ttr tts ttt ttx txe txi txk txs txt xaa xak xar xas xat xee xer xes xet xex xia xie xii xis xit xix xke xks xrt xrx xsa xsi xss xst xti xtr xts xtx xxi xxx