a-a a-c aaa aac aae aag aam aan ac- aca acc ace acg acm acn aea aec aee aeg aem aen ag- aga agc age agg agm agn ama amc ame amg amm amn an- ana anc ane ang anm ann c-- caa cac cae cag cam can cca ccc cce ccg ccm ccn ce- cea cec cee ceg cem cen cga cgc cge cgg cgm cgn cma cmc cme cmg cmm cmn cn- cna cnc cne cng cnm cnn eaa eac eae eag eam ean ec- eca ecc ece ecg ecm ecn eea eec eee eeg eem een ega egc ege egg egm egn em- ema emc eme emg emm emn en- ena enc ene eng enm enn gaa gac gae gag gam gan gca gcc gce gcg gcm gcn ge- gea gec gee geg gem gen gga ggc ggg ggm ggn gma gmc gme gmg gmm gmn gna gnc gne gnm gnn maa mac mae mag mam man mc- mca mcc mce mcg mcm mcn mea mec mee meg mem men mga mgc mge mgm mgn mma mmc mme mmg mmm mmn mna mnc mne mng mnm mnn naa nac nae nag nam nan nca ncc nce ncg ncm ncn ne- nea nec nee neg nem nen nga ngc nge ngg ngm ngn nma nmc nme nmg nmm nmn nna nnc nne nng nnm nnn