a-a a-c aaa aac aaf aag aah aan ac- aca acc acf acg ach acn af- afa afc aff afg afh afn ag- aga agc agf agg agh agn aha ahc ahf ahg ahh ahn an- ana anc anf ang anh ann c-- caa cac caf cag cah can cca ccc ccf ccg cch ccn cfa cfc cff cfg cfh cfn cga cgc cgg cgh cgn ch- cha chc chf chg chh chn cn- cna cnc cnf cng cnh cnn faa fac faf fag fah fan fca fcc fcf fcg fcn ffa ffc fff ffg ffh ffn fga fgc fgf fgg fgh fgn fha fhc fhf fhg fhh fhn fna fnc fnf fng fnh fnn gaa gac gaf gag gah gan gca gcc gcf gcg gch gcn gfa gfc gff gfh gga ggc ggg ggh ggn gha ghc ghg ghh ghn gna gnc gnf gnn haa hac haf hag hah han hca hcc hcf hcg hch hcn hfa hfc hff hfg hfh hfn hga hgc hgf hgg hgh hgn hha hhc hhf hhg hhh hhn hna hnc hnf hng hnh hnn naa nac naf nag nah nan nca ncc ncf ncg nch ncn nfa nfc nff nfn nga ngc ngf ngg ngh ngn nha nhc nhf nhg nhh nhn nna nnc nnf nng nnh nnn