a-a a-c a-t aaa aac aad aap aat ac- aca acc acd acp act ad- ada adc add adp adt ap- apa apc apd app apt at- ata atc atd atp att c-- caa cac cad cap cat cca ccc ccd ccp cct cda cdc cdd cdp cdt cpa cpc cpd cpp cpt cta ctc ctd ctp ctt daa dac dad dap dat dca dcc dcd dcp dct dda ddc ddd ddp ddt dpa dpc dpd dpp dpt dta dtc dtd dtp dtt p-p paa pac pad pap pat pca pcc pcd pcp pct pda pdc pdd pdp pdt ppa ppc ppd ppp ppt pt- pta ptc ptd ptp ptt taa tac tad tap tat tca tcc tcd tcp tct tda tdc tdd tdp tdt tpa tpc tpd tpp tpt tta ttc ttd ttp ttt