-er a-a a-c a-t aaa aac aae aak aam aao aar aas aat ac- aca acc ace ack acm aco acr acs act aea aec aee aek aem aeo aer aes aet aka akc ake akk akm ako akr aks ama amc ame amk amm amo amr ams amt aoa aoc aoe aok aom aoo aor aos aot ar- ara arc are ark arm aro arr ars art as- asa asc ase ask asm aso asr ass ast at- ata atc ate atm ato atr ats att c-- caa cac cae cak cam cao car cas cat cca ccc cce cck ccm cco ccr ccs cct ce- cea cec cee cek cem ceo cer ces cet cka ckc ckm cko cks ckt cma cmc cme cmk cmm cmo cmr cms cmt co- coa coc coe cok com coo cor cos cot cra crc cre crk crm cro crr crs crt csa csc cse csk csm cso csr css cst cta ctc cte ctk ctm cto ctr cts ctt eaa eac eae eak eam eao ear eas eat ec- eca ecc ece eck ecm eco ecr ecs ect eea eec eee eek eem eeo eer ees eet eka ekc eke eko ekr eks ekt em- ema emc eme emk emm emo emr ems emt eo- eoa eoc eoe eok eom eoo eor eos eot era erc ere erk erm ero err ers ert es- esa esc ese esk esm eso esr ess est eta etc ete etk etm eto etr ets ett k-t ka- kaa kac kae kak kam kao kar kas kat kca kcc kce kck kcm kcr kcs kct ke- kea kec kee kek kem keo ker kes ket kkc kke kkk kkm kkr kks kkt kma kmc kme kmk kmm kmo kms kmt koa koc koe kok kom koo kor kos kot kra krc krk kro krr krs krt ksa ksc kse ksk ksm kso ksr kss kst kta ktc kte ktk ktm kto ktr kts ktt m-o m-r maa mac mae mak mam mao mar mas mat mc- mca mcc mce mck mcm mco mcr mcs mct mea mec mee mek mem meo mer mes met mka mkc mke mkk mkm mko mkr mks mkt mma mmc mme mmk mmm mmo mmr mms mmt moa moc moe mok mom moo mor mos mot mra mrc mre mrk mrm mro mrr mrs mrt msa msc mse msk msm mso msr mss mst mta mtc mte mtk mtm mto mtr mts mtt oaa oac oae oak oam oao oar oas oat oc- oca occ ock ocm oco ocr ocs oct oea oec oee oem oeo oer oes oet oka okc oke okk oko okr oks om- oma omc ome omm omo omr oms omt oo- ooa ooc ook oom ooo oor oos oot or- ora orc ore ork orm oro orr ors ort os- osa osc ose osk osm oso osr oss ost ot- ota otc ote otk otm oto otr ots ott ra- raa rac rae rak ram rao rar ras rat rca rcc rce rcm rco rcr rcs rct re- rea rec ree rek rem reo rer res ret rkc rke rkk rkm rko rks rkt rma rmc rme rmm rmo rmr rms rmt roa roc roe rok rom roo ror ros rot rra rrc rrk rrm rrr rrs rrt rsa rsc rse rsk rsm rso rsr rss rst rta rtc rte rtk rtm rto rtr rts rtt saa sac sae sak sam sao sar sas sat sca scc sce sck scm sco scr scs sct se- sea sec see sek sem seo ser ses set sk- ska skc ske skk skm sko skr sks skt sma smc sme smk smm smo smr sms smt soa soc soe sok som soo sor sos sot sr- sra src sre srk srm sro srr srs srt ss- ssa ssc sse ssk ssm sso ssr sss sst sta stc ste stk stm sto str sts stt taa tac tae tak tam tao tar tas tat tca tcc tce tck tcm tco tcr tcs tct te- tea tec tee tek tem teo ter tes tet tka tkc tke tkk tkm tko tkr tks tkt tma tmc tme tmk tmm tmo tmr tms tmt to- toa toc toe tok tom too tor tos tot tra trc tre trk trm tro trr trs trt tsa tsc tse tsk tsm tso tsr tss tst tta ttc tte ttk ttm tto ttr tts ttt