a-a a-c a-t aaa aac aam aao aar aat ac- aca acc acm aco acr act ama amc amm amo amr amt aoa aoc aom aoo aor aot ar- ara arc arm aro arr art at- ata atc atm ato atr att c-- caa cac cam cao car cat cca ccc ccm cco ccr cct cma cmc cmm cmo cmr cmt co- coa coc com coo cor cot cra crc crm cro crr crt cta ctc ctm cto ctr ctt m-o m-r maa mac mam mao mar mat mc- mca mcc mcm mco mcr mct mma mmc mmm mmo mmr mmt moa moc mom moo mor mot mra mrc mrm mro mrr mrt mta mtc mtm mto mtr mtt oaa oac oam oao oar oat oc- oca occ ocm oco ocr oct om- oma omc omm omo omr omt oo- ooa ooc oom ooo oor oot or- ora orc orm oro orr ort ot- ota otc otm oto otr ott ra- raa rac ram rao rar rat rca rcc rcm rco rcr rct rma rmc rmm rmo rmr rmt roa roc rom roo ror rot rra rrc rrm rrr rrt rta rtc rtm rto rtr rtt taa tac tam tao tar tat tca tcc tcm tco tcr tct tma tmc tmm tmo tmr tmt to- toa toc tom too tor tot tra trc trm tro trr trt tta ttc ttm tto ttr ttt