a-a a-c a-t aaa aac aam aan aat aax ac- aca acc acm acn act acx ama amc amm amn amt amx an- ana anc anm ann ant anx at- ata atc atm atn att atx ax- axa axm axn axt axx c-- caa cac cam can cat cax cca ccc ccm ccn cct ccx cma cmc cmm cmn cmt cmx cn- cna cnc cnm cnn cnt cnx cta ctc ctm ctn ctt ctx cxc cxt cxx maa mac mam man mat max mc- mca mcc mcm mcn mct mcx mma mmc mmm mmn mmt mmx mna mnc mnm mnn mnt mta mtc mtm mtn mtt mtx mxa mxc mxn naa nac nam nan nat nax nca ncc ncm ncn nct ncx nma nmc nmm nmn nmt nna nnc nnm nnn nnt nta ntc ntm ntn ntt ntx nxc nxt t-x taa tac tam tan tat tax tca tcc tcm tcn tct tcx tma tmc tmm tmn tmt tmx tna tnc tnm tnn tnt tnx tta ttc ttm ttn ttt ttx txn txt xaa xac xam xan xat xcx xma xmc xmm xmt xmx xna xnc xtc xtm xtx xxx