a-a a-c aaa aac aaf aag aau ac- aca acc acf acg acu af- afa afc aff afg afu ag- aga agc agf agg agu au- aua auc auf aug c-- caa cac caf cag cau cca ccc ccf ccg ccu cfa cfc cff cfg cfu cga cgc cgg cgu cua cuc cuf cug cuu faa fac faf fag fau fca fcc fcf fcg fcu ffa ffc fff ffg ffu fga fgc fgf fgg fua fuf fug fuu gaa gac gaf gag gau gca gcc gcf gcg gcu gfa gfc gff gga ggc ggg ggu gu- gua guc guf gug guu ua- uaa uac uaf uag uau uca ucc ucf ucg ucu ufa ufc uff ufg ufu uga ugc ugf ugg ugu uua uuc uug uuu