a-a a-c a-t aaa aac aae aao aat ac- aca acc ace aco act aea aec aee aeo aet aoa aoc aoe aoo aot at- ata atc ate ato att c-- caa cac cae cao cat cca ccc cce cco cct ce- cea cec cee ceo cet co- coa coc coe coo cot cta ctc cte cto ctt eaa eac eae eao eat ec- eca ecc ece eco ect eea eec eee eeo eet eo- eoa eoc eoe eoo eot eta etc ete eto ett oaa oac oae oao oat oc- oca occ oco oct oea oec oee oeo oet oo- ooa ooc ooo oot ot- ota otc ote oto ott taa tac tae tao tat tca tcc tce tco tct te- tea tec tee teo tet to- toa toc toe too tot tta ttc tte tto ttt