a-a a-c aaa aac aah aak aao ac- aca acc ach ack aco aha ahc ahh ahk aho aka akc akh akk ako aoa aoc aoh aok aoo c-- caa cac cah cak cao cca ccc cch cck cco ch- cha chc chh chk cho cka ckc ckh cko co- coa coc coh cok coo haa hac hah hak hao hca hcc hch hck hco hha hhc hhh hhk hho hka hkh hkk hko hoa hoc hoh hok hoo ka- kaa kac kah kak kao kca kcc kch kck kha khh khk kho kkc kkh kkk koa koc koh kok koo oaa oac oah oak oao oc- oca occ och ock oco oha ohc ohh oho oka okc okk oko oo- ooa ooc ooh ook ooo