a-a a-c a-t aaa aac aae aaf aao aat ac- aca acc ace acf aco act aea aec aee aef aeo aet af- afa afc afe aff afo aft aoa aoc aoe aof aoo aot at- ata atc ate atf ato att c-- caa cac cae caf cao cat cca ccc cce ccf cco cct ce- cea cec cee cef ceo cet cfa cfc cfe cff cfo cft co- coa coc coe cof coo cot cta ctc cte ctf cto ctt eaa eac eae eaf eao eat ec- eca ecc ece ecf eco ect eea eec eee eef eeo eet ef- efa efc efe eff efo eft eo- eoa eoc eoe eof eoo eot eta etc ete etf eto ett faa fac fae faf fao fat fca fcc fce fcf fco fct fea fec fee fef feo fet ffa ffc ffe fff ffo fft foa foc foe fof foo fot fta ftc fte ftf fto ftt oaa oac oae oaf oao oat oc- oca occ ocf oco oct oea oec oee oef oeo oet of- ofa ofc ofe off ofo oft oo- ooa ooc oof ooo oot ot- ota otc ote otf oto ott taa tac tae taf tao tat tca tcc tce tcf tco tct te- tea tec tee tef teo tet tfa tfc tfe tff tfo tft to- toa toc toe tof too tot tta ttc tte ttf tto ttt