a-a a-c a-t aaa aac aan aat aay ac- aca acc acn act acy an- ana anc ann ant any at- ata atc atn att ay- aya ayc ayn ayt c-- caa cac can cat cay cca ccc ccn cct cn- cna cnc cnn cnt cny cta ctc ctn ctt cty cya cyc cyn cyt naa nac nan nat nay nca ncc ncn nct nna nnc nnn nnt nta ntc ntn ntt nya nyc nyn nyt nyy taa tac tan tat tay tca tcc tcn tct tna tnc tnn tnt tta ttc ttn ttt tty tya tyc tyn tyt yaa yac yan yat yay yca ycc ycy yna ynn yny yta ytc ytn ytt yyc yyt yyy