-er a-a a-t aaa aae aao aar aas aat aax aea aee aeo aer aes aet aex aoa aoe aoo aor aos aot aox ar- ara are aro arr ars art arx as- asa ase aso asr ass ast asx at- ata ate ato atr ats att atx ax- axa axe axo axr axs axt axx eaa eae eao ear eas eat eax eea eee eeo eer ees eet eex eo- eoa eoe eoo eor eos eot era ere ero err ers ert es- esa ese eso esr ess est esx eta ete eto etr ets ett etx ex- exa exe exo exr exs ext exx oaa oae oao oar oas oat oax oea oee oeo oer oes oet oex oo- ooa ooo oor oos oot oox or- ora ore oro orr ors ort orx os- osa ose oso osr oss ost osx ot- ota ote oto otr ots ott ox- oxa oxo oxt oxx ra- raa rae rao rar ras rat rax re- rea ree reo rer res ret rex roa roe roo ror ros rot rox rra rrr rrs rrt rsa rse rso rsr rss rst rsx rta rte rto rtr rts rtt rtx rxr rxs saa sae sao sar sas sat sax se- sea see seo ser ses set sex soa soe soo sor sos sot sox sr- sra sre sro srr srs srt srx ss- ssa sse sso ssr sss sst ssx sta ste sto str sts stt stx sxs sxt t-x taa tae tao tar tas tat tax te- tea tee teo ter tes tet tex to- toa toe too tor tos tot tox tra tre tro trr trs trt trx tsa tse tso tsr tss tst tsx tta tte tto ttr tts ttt ttx txe txs txt xaa xar xas xat xee xer xes xet xex xoa xoo xor xos xot xox xrt xrx xsa xss xst xtr xts xtx xxo xxx