a-a a-c aaa aac aad aae aag aan ac- aca acc acd ace acg acn ad- ada adc add ade adg adn aea aec aed aee aeg aen ag- aga agc agd age agg agn an- ana anc and ane ang ann c-- caa cac cad cae cag can cca ccc ccd cce ccg ccn cda cdc cdd cde cdg cdn ce- cea cec ced cee ceg cen cga cgc cgd cge cgg cgn cn- cna cnc cnd cne cng cnn daa dac dad dae dag dan dca dcc dcd dce dcg dcn dda ddc ddd dde ddg ddn de- dea dec ded dee deg den dga dgc dgd dge dgg dgn dna dnc dnd dne dng dnn eaa eac ead eae eag ean ec- eca ecc ecd ece ecg ecn ed- eda edc edd ede edg edn eea eec eed eee eeg een ega egc egd ege egg egn en- ena enc end ene eng enn g-d gaa gac gad gae gag gan gca gcc gcd gce gcg gcn gda gdc gdd gde gdn ge- gea gec ged gee geg gen gga ggc ggd ggg ggn gna gnc gnd gne gnn naa nac nad nae nag nan nca ncc ncd nce ncg ncn nda ndc ndd nde ndg ndn ne- nea nec ned nee neg nen nga ngc ngd nge ngg ngn nna nnc nne nng nnn