a-a a-c aaa aac aad aae aag aak ac- aca acc acd ace acg ack ad- ada adc add ade adg adk aea aec aed aee aeg aek ag- aga agc agd age agg agk aka akc akd ake akg akk c-- caa cac cad cae cag cak cca ccc ccd cce ccg cck cda cdc cdd cde cdg cdk ce- cea cec ced cee ceg cek cga cgc cgd cge cgg cka ckc ckd daa dac dad dae dag dak dca dcc dcd dce dcg dck dda ddc ddd dde ddg ddk de- dea dec ded dee deg dek dga dgc dgd dge dgg dgk dka dkc dke dkg dkk eaa eac ead eae eag eak ec- eca ecc ecd ece ecg eck ed- eda edc edd ede edg edk eea eec eed eee eeg eek ega egc egd ege egg eka ekc ekd eke ekg g-d gaa gac gad gae gag gak gca gcc gcd gce gcg gck gda gdc gdd gde gdk ge- gea gec ged gee geg gek gga ggc ggd ggg gka gkd ka- kaa kac kad kae kag kak kca kcc kcd kce kcg kck kda kdc kde kdg kdk ke- kea kec ked kee keg kek kga kgc kgd kkc kke kkk