a-a a-c a-t aaa aac aae aaf aan aao aat ac- aca acc ace acf acn aco act aea aec aee aef aen aeo aet af- afa afc afe aff afn afo aft an- ana anc ane anf ann ano ant aoa aoc aoe aof aon aoo aot at- ata atc ate atf atn ato att c-- caa cac cae caf can cao cat cca ccc cce ccf ccn cco cct ce- cea cec cee cef cen ceo cet cfa cfc cfe cff cfn cfo cft cn- cna cnc cne cnf cnn cno cnt co- coa coc coe cof con coo cot cta ctc cte ctf ctn cto ctt eaa eac eae eaf ean eao eat ec- eca ecc ece ecf ecn eco ect eea eec eee eef een eeo eet ef- efa efc efe eff efo eft en- ena enc ene enf enn eno ent eo- eoa eoc eoe eof eon eoo eot eta etc ete etf etn eto ett faa fac fae faf fan fao fat fca fcc fce fcf fcn fco fct fea fec fee fef fen feo fet ffa ffc ffe fff ffn ffo fft fna fnc fne fnf fnn fnt foa foc foe fof fon foo fot fta ftc fte ftf ftn fto ftt naa nac nae naf nan nao nat nca ncc nce ncf ncn nco nct ne- nea nec nee nef nen neo net nfa nfc nfe nff nfn nfo nft nna nnc nne nnf nnn nno nnt no- noa noc noe nof non noo not nta ntc nte ntf ntn nto ntt oaa oac oae oaf oan oao oat oc- oca occ ocf ocn oco oct oea oec oee oef oen oeo oet of- ofa ofc ofe off ofn ofo oft on- ona onc one onf onn ono ont oo- ooa ooc oof oon ooo oot ot- ota otc ote otf otn oto ott taa tac tae taf tan tao tat tca tcc tce tcf tcn tco tct te- tea tec tee tef ten teo tet tfa tfc tfe tff tfn tfo tft tna tnc tne tnf tnn tno tnt to- toa toc toe tof ton too tot tta ttc tte ttf ttn tto ttt