a-a a-c a-t aaa aac aad aae aaf aao aat ac- aca acc acd ace acf aco act ad- ada adc add ade adf ado adt aea aec aed aee aef aeo aet af- afa afc afd afe aff afo aft aoa aoc aod aoe aof aoo aot at- ata atc atd ate atf ato att c-- caa cac cad cae caf cao cat cca ccc ccd cce ccf cco cct cda cdc cdd cde cdf cdo cdt ce- cea cec ced cee cef ceo cet cfa cfc cfd cfe cff cfo cft co- coa coc cod coe cof coo cot cta ctc ctd cte ctf cto ctt daa dac dad dae daf dao dat dca dcc dcd dce dcf dco dct dda ddc ddd dde ddf ddo ddt de- dea dec ded dee def deo det dfa dfc dfd dfe dff dfo dft doa doc dod doe dof doo dot dta dtc dtd dte dtf dto dtt eaa eac ead eae eaf eao eat ec- eca ecc ecd ece ecf eco ect ed- eda edc edd ede edf edo edt eea eec eed eee eef eeo eet ef- efa efc efd efe eff efo eft eo- eoa eoc eod eoe eof eoo eot eta etc etd ete etf eto ett faa fac fad fae faf fao fat fca fcc fcd fce fcf fco fct fda fdc fdd fde fdf fdo fdt fea fec fed fee fef feo fet ffa ffc ffd ffe fff ffo fft foa foc foe fof foo fot fta ftc ftd fte ftf fto ftt oaa oac oad oae oaf oao oat oc- oca occ ocd ocf oco oct oda odc odd ode odf odo odt oea oec oed oee oef oeo oet of- ofa ofc ofd ofe off ofo oft oo- ooa ooc ood oof ooo oot ot- ota otc otd ote otf oto ott taa tac tad tae taf tao tat tca tcc tcd tce tcf tco tct tda tdc tdd tde tdf tdo tdt te- tea tec ted tee tef teo tet tfa tfc tfd tfe tff tfo tft to- toa toc tod toe tof too tot tta ttc ttd tte ttf tto ttt