a-a a-c aaa aac aae aag aam aas ac- aca acc ace acg acm acs aea aec aee aeg aem aes ag- aga agc age agg agm ags ama amc ame amg amm ams as- asa asc ase asg asm ass c-- caa cac cae cag cam cas cca ccc cce ccg ccm ccs ce- cea cec cee ceg cem ces cga cgc cge cgg cgm cgs cma cmc cme cmg cmm cms csa csc cse csg csm css eaa eac eae eag eam eas ec- eca ecc ece ecg ecm ecs eea eec eee eeg eem ees ega egc ege egg egm egs em- ema emc eme emg emm ems es- esa esc ese esg esm ess gaa gac gae gag gam gas gca gcc gce gcg gcm gcs ge- gea gec gee geg gem ges gga ggc ggg ggm ggs gma gmc gme gmg gmm gms gsa gsc gse gsg gsm gss maa mac mae mag mam mas mc- mca mcc mce mcg mcm mcs mea mec mee meg mem mes mga mgc mge mgm mgs mma mmc mme mmg mmm mms msa msc mse msg msm mss saa sac sae sag sam sas sca scc sce scg scm scs se- sea sec see seg sem ses sga sgc sge sgg sgm sgs sma smc sme smg smm sms ss- ssa ssc sse ssg ssm sss