a-a a-c a-t aaa aac aae aao aap aat ac- aca acc ace aco acp act aea aec aee aeo aep aet aoa aoc aoe aoo aop aot ap- apa apc ape apo app apt at- ata atc ate ato atp att c-- caa cac cae cao cap cat cca ccc cce cco ccp cct ce- cea cec cee ceo cep cet co- coa coc coe coo cop cot cpa cpc cpe cpo cpp cpt cta ctc cte cto ctp ctt eaa eac eae eao eap eat ec- eca ecc ece eco ect eea eec eee eeo eep eet eo- eoa eoc eoe eoo eop eot ep- epa epc epe epo epp ept eta etc ete eto etp ett oaa oac oae oao oap oat oc- oca occ oco ocp oct oea oec oee oeo oep oet oo- ooa ooc ooo oop oot op- opa opc ope opo opp opt ot- ota otc ote oto otp ott p-p paa pac pae pao pap pat pca pcc pce pco pcp pct pea pec pee peo pep pet poa poc poe poo pop pot ppa ppc ppe ppo ppp ppt pt- pta ptc pte pto ptp ptt taa tac tae tao tap tat tca tcc tce tco tcp tct te- tea tec tee teo tep tet to- toa toc toe too top tot tpa tpc tpe tpo tpp tpt tta ttc tte tto ttp ttt