a-a a-c aaa aac aae aaf aag aah aan aao ac- aca acc ace acf acg ach acn aco aea aec aee aef aeg aeh aen aeo af- afa afc afe aff afg afh afn afo ag- aga agc age agf agg agh agn ago aha ahc ahe ahf ahg ahh ahn aho an- ana anc ane anf ang anh ann ano aoa aoc aoe aof aog aoh aon aoo c-- caa cac cae caf cag cah can cao cca ccc cce ccf ccg cch ccn cco ce- cea cec cee cef ceg ceh cen ceo cfa cfc cfe cff cfg cfh cfn cfo cga cgc cge cgg cgh cgn cgo ch- cha chc che chf chg chh chn cho cn- cna cnc cne cnf cng cnh cnn cno co- coa coc coe cof cog coh con coo eaa eac eae eaf eag eah ean eao ec- eca ecc ece ecf ecg ech ecn eco eea eec eee eef eeg een eeo ef- efa efc efe eff efg efh efo ega egc ege egf egg egh egn ego eha ehc ehe ehf ehg ehh ehn eho en- ena enc ene enf eng enh enn eno eo- eoa eoc eoe eof eog eoh eon eoo faa fac fae faf fag fah fan fao fca fcc fce fcf fcg fcn fco fea fec fee fef feg feh fen feo ffa ffc ffe fff ffg ffh ffn ffo fga fgc fge fgf fgg fgh fgn fha fhc fhe fhf fhg fhh fhn fho fna fnc fne fnf fng fnh fnn foa foc foe fof fog foh fon foo gaa gac gae gaf gag gah gan gao gca gcc gce gcf gcg gch gcn gco ge- gea gec gee gef geg geh gen geo gfa gfc gfe gff gfh gfo gga ggc ggg ggh ggn ggo gha ghc ghe ghg ghh ghn gho gna gnc gne gnf gnn gno goa goc goe gof gog goh gon goo haa hac hae haf hag hah han hao hca hcc hce hcf hcg hch hcn hco he- hea hec hee hef heg heh hen heo hfa hfc hfe hff hfg hfh hfn hfo hga hgc hge hgf hgg hgh hgn hgo hha hhc hhe hhf hhg hhh hhn hho hna hnc hne hnf hng hnh hnn hno hoa hoc hoe hof hog hoh hon hoo naa nac nae naf nag nah nan nao nca ncc nce ncf ncg nch ncn nco ne- nea nec nee nef neg neh nen neo nfa nfc nfe nff nfn nfo nga ngc nge ngf ngg ngh ngn ngo nha nhc nhe nhf nhg nhh nhn nna nnc nne nnf nng nnh nnn nno no- noa noc noe nof nog noh non noo oaa oac oae oaf oag oah oan oao oc- oca occ ocf ocg och ocn oco oea oec oee oef oeg oeh oen oeo of- ofa ofc ofe off ofg ofn ofo oga ogc oge ogf ogg ogh ogn ogo oha ohc ohe ohf ohg ohh ohn oho on- ona onc one onf ong onh onn ono oo- ooa ooc oof oog ooh oon ooo