a-a a-c aaa aac aad aag aak ac- aca acc acd acg ack ad- ada adc add adg adk ag- aga agc agd agg agk aka akc akd akg akk c-- caa cac cad cag cak cca ccc ccd ccg cck cda cdc cdd cdg cdk cga cgc cgd cgg cka ckc ckd daa dac dad dag dak dca dcc dcd dcg dck dda ddc ddd ddg ddk dga dgc dgd dgg dgk dka dkc dkg dkk g-d gaa gac gad gag gak gca gcc gcd gcg gck gda gdc gdd gdk gga ggc ggd ggg gka gkd ka- kaa kac kad kag kak kca kcc kcd kcg kck kda kdc kdg kdk kga kgc kgd kkc kkk