a-a a-c a-t aaa aac aam aan aat ac- aca acc acm acn act ama amc amm amn amt an- ana anc anm ann ant at- ata atc atm atn att c-- caa cac cam can cat cca ccc ccm ccn cct cma cmc cmm cmn cmt cn- cna cnc cnm cnn cnt cta ctc ctm ctn ctt maa mac mam man mat mc- mca mcc mcm mcn mct mma mmc mmm mmn mmt mna mnc mnm mnn mnt mta mtc mtm mtn mtt naa nac nam nan nat nca ncc ncm ncn nct nma nmc nmm nmn nmt nna nnc nnm nnn nnt nta ntc ntm ntn ntt taa tac tam tan tat tca tcc tcm tcn tct tma tmc tmm tmn tmt tna tnc tnm tnn tnt tta ttc ttm ttn ttt