a-a a-c aaa aac aaf aag aan aau ac- aca acc acf acg acn acu af- afa afc aff afg afn afu ag- aga agc agf agg agn agu an- ana anc anf ang ann anu au- aua auc auf aug aun c-- caa cac caf cag can cau cca ccc ccf ccg ccn ccu cfa cfc cff cfg cfn cfu cga cgc cgg cgn cgu cn- cna cnc cnf cng cnn cnu cua cuc cuf cug cun cuu faa fac faf fag fan fau fca fcc fcf fcg fcn fcu ffa ffc fff ffg ffn ffu fga fgc fgf fgg fgn fna fnc fnf fng fnn fnu fua fuf fug fun fuu gaa gac gaf gag gan gau gca gcc gcf gcg gcn gcu gfa gfc gff gga ggc ggg ggn ggu gna gnc gnf gnn gnu gu- gua guc guf gug gun guu naa nac naf nag nan nau nca ncc ncf ncg ncn ncu nfa nfc nff nfn nfu nga ngc ngf ngg ngn ngu nna nnc nnf nng nnn nnu nua nuc nug nun nuu ua- uaa uac uaf uag uan uau uca ucc ucf ucg ucn ucu ufa ufc uff ufg ufn ufu uga ugc ugf ugg ugn ugu un- una unc unf ung unn unu uua uuc uug uun uuu