a-a a-c aaa aac aae aaf aag aah aan ac- aca acc ace acf acg ach acn aea aec aee aef aeg aeh aen af- afa afc afe aff afg afh afn ag- aga agc age agf agg agh agn aha ahc ahe ahf ahg ahh ahn an- ana anc ane anf ang anh ann c-- caa cac cae caf cag cah can cca ccc cce ccf ccg cch ccn ce- cea cec cee cef ceg ceh cen cfa cfc cfe cff cfg cfh cfn cga cgc cge cgg cgh cgn ch- cha chc che chf chg chh chn cn- cna cnc cne cnf cng cnh cnn eaa eac eae eaf eag eah ean ec- eca ecc ece ecf ecg ech ecn eea eec eee eef eeg een ef- efa efc efe eff efg efh ega egc ege egf egg egh egn eha ehc ehe ehf ehg ehh ehn en- ena enc ene enf eng enh enn faa fac fae faf fag fah fan fca fcc fce fcf fcg fcn fea fec fee fef feg feh fen ffa ffc ffe fff ffg ffh ffn fga fgc fge fgf fgg fgh fgn fha fhc fhe fhf fhg fhh fhn fna fnc fne fnf fng fnh fnn gaa gac gae gaf gag gah gan gca gcc gce gcf gcg gch gcn ge- gea gec gee gef geg geh gen gfa gfc gfe gff gfh gga ggc ggg ggh ggn gha ghc ghe ghg ghh ghn gna gnc gne gnf gnn haa hac hae haf hag hah han hca hcc hce hcf hcg hch hcn he- hea hec hee hef heg heh hen hfa hfc hfe hff hfg hfh hfn hga hgc hge hgf hgg hgh hgn hha hhc hhe hhf hhg hhh hhn hna hnc hne hnf hng hnh hnn naa nac nae naf nag nah nan nca ncc nce ncf ncg nch ncn ne- nea nec nee nef neg neh nen nfa nfc nfe nff nfn nga ngc nge ngf ngg ngh ngn nha nhc nhe nhf nhg nhh nhn nna nnc nne nnf nng nnh nnn