a-a a-c aaa aac aae aag aan aas ac- aca acc ace acg acn acs aea aec aee aeg aen aes ag- aga agc age agg agn ags an- ana anc ane ang ann ans as- asa asc ase asg asn ass c-- caa cac cae cag can cas cca ccc cce ccg ccn ccs ce- cea cec cee ceg cen ces cga cgc cge cgg cgn cgs cn- cna cnc cne cng cnn cns csa csc cse csg csn css eaa eac eae eag ean eas ec- eca ecc ece ecg ecn ecs eea eec eee eeg een ees ega egc ege egg egn egs en- ena enc ene eng enn ens es- esa esc ese esg esn ess gaa gac gae gag gan gas gca gcc gce gcg gcn gcs ge- gea gec gee geg gen ges gga ggc ggg ggn ggs gna gnc gne gnn gns gsa gsc gse gsg gsn gss naa nac nae nag nan nas nca ncc nce ncg ncn ncs ne- nea nec nee neg nen nes nga ngc nge ngg ngn ngs nna nnc nne nng nnn nns nsa nsc nse nsg nsn nss saa sac sae sag san sas sca scc sce scg scn scs se- sea sec see seg sen ses sga sgc sge sgg sgn sgs sna snc sne sng snn sns ss- ssa ssc sse ssg ssn sss