a-a a-c aaa aac aan aao aay ac- aca acc acn aco acy an- ana anc ann ano any aoa aoc aon aoo ay- aya ayc ayn ayo c-- caa cac can cao cay cca ccc ccn cco cn- cna cnc cnn cno cny co- coa coc con coo coy cya cyc cyn cyo naa nac nan nao nay nca ncc ncn nco nna nnc nnn nno no- noa noc non noo noy nya nyc nyn nyo nyy oaa oac oan oao oc- oca occ ocn oco on- ona onc onn ono ony oo- ooa ooc oon ooo oya oyo yaa yac yan yao yay yca ycc yco ycy yna ynn yny yoc yon yoo yoy yyc yyy