a-a a-c a-z aaa aac aae aag aan aaz ac- aca acc ace acg acn acz aea aec aee aeg aen aez ag- aga agc age agg agn agz an- ana anc ane ang ann anz az- aza aze azg azn azz c-- caa cac cae cag can caz cca ccc cce ccg ccn ccz ce- cea cec cee ceg cen cez cga cgc cge cgg cgn cn- cna cnc cne cng cnn cz- czc cze eaa eac eae eag ean eaz ec- eca ecc ece ecg ecn eea eec eee eeg een ega egc ege egg egn en- ena enc ene eng enn enz eze ezz gaa gac gae gag gan gaz gca gcc gce gcg gcn ge- gea gec gee geg gen gez gga ggc ggg ggn ggz gna gnc gne gnn gza naa nac nae nag nan naz nca ncc nce ncg ncn ne- nea nec nee neg nen nez nga ngc nge ngg ngn nna nnc nne nng nnn nnz nze nzg nzz z-g zaa zac zag zan zaz zce zea zec zee zen zez zgg znc zne znn zzz