a-a a-c a-t aaa aac aad aao aap aat ac- aca acc acd aco acp act ad- ada adc add ado adp adt aoa aoc aod aoo aop aot ap- apa apc apd apo app apt at- ata atc atd ato atp att c-- caa cac cad cao cap cat cca ccc ccd cco ccp cct cda cdc cdd cdo cdp cdt co- coa coc cod coo cop cot cpa cpc cpd cpo cpp cpt cta ctc ctd cto ctp ctt daa dac dad dao dap dat dca dcc dcd dco dcp dct dda ddc ddd ddo ddp ddt doa doc dod doo dop dot dpa dpc dpd dpo dpp dpt dta dtc dtd dto dtp dtt oaa oac oad oao oap oat oc- oca occ ocd oco ocp oct oda odc odd odo odp odt oo- ooa ooc ood ooo oop oot op- opa opc opd opo opp opt ot- ota otc otd oto otp ott p-p paa pac pad pao pap pat pca pcc pcd pco pcp pct pda pdc pdd pdo pdp pdt poa poc pod poo pop pot ppa ppc ppd ppo ppp ppt pt- pta ptc ptd pto ptp ptt taa tac tad tao tap tat tca tcc tcd tco tcp tct tda tdc tdd tdo tdp tdt to- toa toc tod too top tot tpa tpc tpd tpo tpp tpt tta ttc ttd tto ttp ttt