a-a a-c aaa aac aag aah aak aao ac- aca acc acg ach ack aco ag- aga agc agg agh agk ago aha ahc ahg ahh ahk aho aka akc akg akh akk ako aoa aoc aog aoh aok aoo c-- caa cac cag cah cak cao cca ccc ccg cch cck cco cga cgc cgg cgh cgo ch- cha chc chg chh chk cho cka ckc ckh cko co- coa coc cog coh cok coo gaa gac gag gah gak gao gca gcc gcg gch gck gco gga ggc ggg ggh ggo gha ghc ghg ghh gho gka gkh gko goa goc gog goh gok goo haa hac hag hah hak hao hca hcc hcg hch hck hco hga hgc hgg hgh hgk hgo hha hhc hhg hhh hhk hho hka hkg hkh hkk hko hoa hoc hog hoh hok hoo ka- kaa kac kag kah kak kao kca kcc kcg kch kck kga kgc kgh kgo kha khh khk kho kkc kkh kkk koa koc kog koh kok koo oaa oac oag oah oak oao oc- oca occ ocg och ock oco oga ogc ogg ogh ogo oha ohc ohg ohh oho oka okc okg okk oko oo- ooa ooc oog ooh ook ooo