-er a-a a-c a-t aaa aac aae aam aao aar aas aat ac- aca acc ace acm aco acr acs act aea aec aee aem aeo aer aes aet ama amc ame amm amo amr ams amt aoa aoc aoe aom aoo aor aos aot ar- ara arc are arm aro arr ars art as- asa asc ase asm aso asr ass ast at- ata atc ate atm ato atr ats att c-- caa cac cae cam cao car cas cat cca ccc cce ccm cco ccr ccs cct ce- cea cec cee cem ceo cer ces cet cma cmc cme cmm cmo cmr cms cmt co- coa coc coe com coo cor cos cot cra crc cre crm cro crr crs crt csa csc cse csm cso csr css cst cta ctc cte ctm cto ctr cts ctt eaa eac eae eam eao ear eas eat ec- eca ecc ece ecm eco ecr ecs ect eea eec eee eem eeo eer ees eet em- ema emc eme emm emo emr ems emt eo- eoa eoc eoe eom eoo eor eos eot era erc ere erm ero err ers ert es- esa esc ese esm eso esr ess est eta etc ete etm eto etr ets ett m-o m-r maa mac mae mam mao mar mas mat mc- mca mcc mce mcm mco mcr mcs mct mea mec mee mem meo mer mes met mma mmc mme mmm mmo mmr mms mmt moa moc moe mom moo mor mos mot mra mrc mre mrm mro mrr mrs mrt msa msc mse msm mso msr mss mst mta mtc mte mtm mto mtr mts mtt oaa oac oae oam oao oar oas oat oc- oca occ ocm oco ocr ocs oct oea oec oee oem oeo oer oes oet om- oma omc ome omm omo omr oms omt oo- ooa ooc oom ooo oor oos oot or- ora orc ore orm oro orr ors ort os- osa osc ose osm oso osr oss ost ot- ota otc ote otm oto otr ots ott ra- raa rac rae ram rao rar ras rat rca rcc rce rcm rco rcr rcs rct re- rea rec ree rem reo rer res ret rma rmc rme rmm rmo rmr rms rmt roa roc roe rom roo ror ros rot rra rrc rrm rrr rrs rrt rsa rsc rse rsm rso rsr rss rst rta rtc rte rtm rto rtr rts rtt saa sac sae sam sao sar sas sat sca scc sce scm sco scr scs sct se- sea sec see sem seo ser ses set sma smc sme smm smo smr sms smt soa soc soe som soo sor sos sot sr- sra src sre srm sro srr srs srt ss- ssa ssc sse ssm sso ssr sss sst sta stc ste stm sto str sts stt taa tac tae tam tao tar tas tat tca tcc tce tcm tco tcr tcs tct te- tea tec tee tem teo ter tes tet tma tmc tme tmm tmo tmr tms tmt to- toa toc toe tom too tor tos tot tra trc tre trm tro trr trs trt tsa tsc tse tsm tso tsr tss tst tta ttc tte ttm tto ttr tts ttt