-er a-a a-t aaa aae aam aar aas aat aax aea aee aem aer aes aet aex ama ame amm amr ams amt amx ar- ara are arm arr ars art arx as- asa ase asm asr ass ast asx at- ata ate atm atr ats att atx ax- axa axe axm axr axs axt axx eaa eae eam ear eas eat eax eea eee eem eer ees eet eex em- ema eme emm emr ems emt emx era ere erm err ers ert es- esa ese esm esr ess est esx eta ete etm etr ets ett etx ex- exa exe exr exs ext exx m-r maa mae mam mar mas mat max mea mee mem mer mes met mex mma mme mmm mmr mms mmt mmx mra mre mrm mrr mrs mrt mrx msa mse msm msr mss mst msx mta mte mtm mtr mts mtt mtx mxa mxr mxs ra- raa rae ram rar ras rat rax re- rea ree rem rer res ret rex rma rme rmm rmr rms rmt rmx rra rrm rrr rrs rrt rsa rse rsm rsr rss rst rsx rta rte rtm rtr rts rtt rtx rxr rxs saa sae sam sar sas sat sax se- sea see sem ser ses set sex sma sme smm smr sms smt smx sr- sra sre srm srr srs srt srx ss- ssa sse ssm ssr sss sst ssx sta ste stm str sts stt stx sxm sxs sxt t-x taa tae tam tar tas tat tax te- tea tee tem ter tes tet tex tma tme tmm tmr tms tmt tmx tra tre trm trr trs trt trx tsa tse tsm tsr tss tst tsx tta tte ttm ttr tts ttt ttx txe txs txt xaa xam xar xas xat xee xem xer xes xet xex xma xmm xmr xms xmt xmx xrt xrx xsa xsm xss xst xtm xtr xts xtx xxx