a-a a-c a-t aaa aac aam aao aar aas aat ac- aca acc acm aco acr acs act ama amc amm amo amr ams amt aoa aoc aom aoo aor aos aot ar- ara arc arm aro arr ars art as- asa asc asm aso asr ass ast at- ata atc atm ato atr ats att c-- caa cac cam cao car cas cat cca ccc ccm cco ccr ccs cct cma cmc cmm cmo cmr cms cmt co- coa coc com coo cor cos cot cra crc crm cro crr crs crt csa csc csm cso csr css cst cta ctc ctm cto ctr cts ctt m-o m-r maa mac mam mao mar mas mat mc- mca mcc mcm mco mcr mcs mct mma mmc mmm mmo mmr mms mmt moa moc mom moo mor mos mot mra mrc mrm mro mrr mrs mrt msa msc msm mso msr mss mst mta mtc mtm mto mtr mts mtt oaa oac oam oao oar oas oat oc- oca occ ocm oco ocr ocs oct om- oma omc omm omo omr oms omt oo- ooa ooc oom ooo oor oos oot or- ora orc orm oro orr ors ort os- osa osc osm oso osr oss ost ot- ota otc otm oto otr ots ott ra- raa rac ram rao rar ras rat rca rcc rcm rco rcr rcs rct rma rmc rmm rmo rmr rms rmt roa roc rom roo ror ros rot rra rrc rrm rrr rrs rrt rsa rsc rsm rso rsr rss rst rta rtc rtm rto rtr rts rtt saa sac sam sao sar sas sat sca scc scm sco scr scs sct sma smc smm smo smr sms smt soa soc som soo sor sos sot sr- sra src srm sro srr srs srt ss- ssa ssc ssm sso ssr sss sst sta stc stm sto str sts stt taa tac tam tao tar tas tat tca tcc tcm tco tcr tcs tct tma tmc tmm tmo tmr tms tmt to- toa toc tom too tor tos tot tra trc trm tro trr trs trt tsa tsc tsm tso tsr tss tst tta ttc ttm tto ttr tts ttt