a-a a-c a-t aaa aac aam aar aat ac- aca acc acm acr act ama amc amm amr amt ar- ara arc arm arr art at- ata atc atm atr att c-- caa cac cam car cat cca ccc ccm ccr cct cma cmc cmm cmr cmt cra crc crm crr crt cta ctc ctm ctr ctt m-r maa mac mam mar mat mc- mca mcc mcm mcr mct mma mmc mmm mmr mmt mra mrc mrm mrr mrt mta mtc mtm mtr mtt ra- raa rac ram rar rat rca rcc rcm rcr rct rma rmc rmm rmr rmt rra rrc rrm rrr rrt rta rtc rtm rtr rtt taa tac tam tar tat tca tcc tcm tcr tct tma tmc tmm tmr tmt tra trc trm trr trt tta ttc ttm ttr ttt