a-a a-c a-t aaa aac aam aao aat ac- aca acc acm aco act ama amc amm amo amt aoa aoc aom aoo aot at- ata atc atm ato att c-- caa cac cam cao cat cca ccc ccm cco cct cma cmc cmm cmo cmt co- coa coc com coo cot cta ctc ctm cto ctt m-o maa mac mam mao mat mc- mca mcc mcm mco mct mma mmc mmm mmo mmt moa moc mom moo mot mta mtc mtm mto mtt oaa oac oam oao oat oc- oca occ ocm oco oct om- oma omc omm omo omt oo- ooa ooc oom ooo oot ot- ota otc otm oto ott taa tac tam tao tat tca tcc tcm tco tct tma tmc tmm tmo tmt to- toa toc tom too tot tta ttc ttm tto ttt