a-a a-c a-t aaa aac aae aaf aan aat ac- aca acc ace acf acn act aea aec aee aef aen aet af- afa afc afe aff afn aft an- ana anc ane anf ann ant at- ata atc ate atf atn att c-- caa cac cae caf can cat cca ccc cce ccf ccn cct ce- cea cec cee cef cen cet cfa cfc cfe cff cfn cft cn- cna cnc cne cnf cnn cnt cta ctc cte ctf ctn ctt eaa eac eae eaf ean eat ec- eca ecc ece ecf ecn ect eea eec eee eef een eet ef- efa efc efe eff eft en- ena enc ene enf enn ent eta etc ete etf etn ett faa fac fae faf fan fat fca fcc fce fcf fcn fct fea fec fee fef fen fet ffa ffc ffe fff ffn fft fna fnc fne fnf fnn fnt fta ftc fte ftf ftn ftt naa nac nae naf nan nat nca ncc nce ncf ncn nct ne- nea nec nee nef nen net nfa nfc nfe nff nfn nft nna nnc nne nnf nnn nnt nta ntc nte ntf ntn ntt taa tac tae taf tan tat tca tcc tce tcf tcn tct te- tea tec tee tef ten tet tfa tfc tfe tff tfn tft tna tnc tne tnf tnn tnt tta ttc tte ttf ttn ttt