a-a a-c aaa aac aae aaf aag aao aau ac- aca acc ace acf acg aco acu aea aec aee aef aeg aeo aeu af- afa afc afe aff afg afo afu ag- aga agc age agf agg ago agu aoa aoc aoe aof aog aoo aou au- aua auc aue auf aug auo c-- caa cac cae caf cag cao cau cca ccc cce ccf ccg cco ccu ce- cea cec cee cef ceg ceo ceu cfa cfc cfe cff cfg cfo cfu cga cgc cge cgg cgo cgu co- coa coc coe cof cog coo cou cua cuc cue cuf cug cuo cuu eaa eac eae eaf eag eao eau ec- eca ecc ece ecf ecg eco ecu eea eec eee eef eeg eeo ef- efa efc efe eff efg efo ega egc ege egf egg ego egu eo- eoa eoc eoe eof eog eoo eou eu- eua euc eue euf eug faa fac fae faf fag fao fau fca fcc fce fcf fcg fco fcu fea fec fee fef feg feo feu ffa ffc ffe fff ffg ffo ffu fga fgc fge fgf fgg foa foc foe fof fog foo fou fua fue fuf fug fuo fuu gaa gac gae gaf gag gao gau gca gcc gce gcf gcg gco gcu ge- gea gec gee gef geg geo geu gfa gfc gfe gff gfo gga ggc ggg ggo ggu goa goc goe gof gog goo gou gu- gua guc gue guf gug guo guu oaa oac oae oaf oag oao oau oc- oca occ ocf ocg oco ocu oea oec oee oef oeg oeo of- ofa ofc ofe off ofg ofo ofu oga ogc oge ogf ogg ogo oo- ooa ooc oof oog ooo ou- oua ouc oue ouf ouo ua- uaa uac uae uaf uag uao uau uca ucc uce ucf ucg uco ucu uea uec uee uef ueg ufa ufc ufe uff ufg ufo ufu uga ugc uge ugf ugg ugo ugu uoa uoc uoe uog uoo uua uuc uue uug uuu