a-a a-c aaa aac aah aao aay ac- aca acc ach aco acy aha ahc ahh aho ahy aoa aoc aoh aoo ay- aya ayc ayh ayo c-- caa cac cah cao cay cca ccc cch cco ch- cha chc chh cho chy co- coa coc coh coo coy cya cyc cyo haa hac hah hao hay hca hcc hch hco hcy hha hhc hhh hho hhy hoa hoc hoh hoo hoy hy- hya hyc hyh hyo hyy oaa oac oah oao oc- oca occ och oco oha ohc ohh oho oo- ooa ooc ooh ooo oya oyo yaa yac yah yao yay yca ycc ych yco ycy yha yhc yoc yoo yoy yyc yyy