a-a a-c aaa aac aag aak aao ac- aca acc acg ack aco ag- aga agc agg agk ago aka akc akg akk ako aoa aoc aog aok aoo c-- caa cac cag cak cao cca ccc ccg cck cco cga cgc cgg cgo cka ckc cko co- coa coc cog cok coo gaa gac gag gak gao gca gcc gcg gck gco gga ggc ggg ggo gka gko goa goc gog gok goo ka- kaa kac kag kak kao kca kcc kcg kck kga kgc kgo kkc kkk koa koc kog kok koo oaa oac oag oak oao oc- oca occ ocg ock oco oga ogc ogg ogo oka okc okg okk oko oo- ooa ooc oog ook ooo