a-a a-c a-t aaa aac aam aao aas aat ac- aca acc acm aco acs act ama amc amm amo ams amt aoa aoc aom aoo aos aot as- asa asc asm aso ass ast at- ata atc atm ato ats att c-- caa cac cam cao cas cat cca ccc ccm cco ccs cct cma cmc cmm cmo cms cmt co- coa coc com coo cos cot csa csc csm cso css cst cta ctc ctm cto cts ctt m-o maa mac mam mao mas mat mc- mca mcc mcm mco mcs mct mma mmc mmm mmo mms mmt moa moc mom moo mos mot msa msc msm mso mss mst mta mtc mtm mto mts mtt oaa oac oam oao oas oat oc- oca occ ocm oco ocs oct om- oma omc omm omo oms omt oo- ooa ooc oom ooo oos oot os- osa osc osm oso oss ost ot- ota otc otm oto ots ott saa sac sam sao sas sat sca scc scm sco scs sct sma smc smm smo sms smt soa soc som soo sos sot ss- ssa ssc ssm sso sss sst sta stc stm sto sts stt taa tac tam tao tas tat tca tcc tcm tco tcs tct tma tmc tmm tmo tms tmt to- toa toc tom too tos tot tsa tsc tsm tso tss tst tta ttc ttm tto tts ttt