a-a a-c a-t aaa aac aad aae aap aas aat ac- aca acc acd ace acp acs act ad- ada adc add ade adp ads adt aea aec aed aee aep aes aet ap- apa apc apd ape app aps apt as- asa asc asd ase asp ass ast at- ata atc atd ate atp ats att c-- caa cac cad cae cap cas cat cca ccc ccd cce ccp ccs cct cda cdc cdd cde cdp cds cdt ce- cea cec ced cee cep ces cet cpa cpc cpd cpe cpp cps cpt csa csc csd cse csp css cst cta ctc ctd cte ctp cts ctt daa dac dad dae dap das dat dca dcc dcd dce dcp dcs dct dda ddc ddd dde ddp dds ddt de- dea dec ded dee dep des det dpa dpc dpd dpe dpp dps dpt dsa dsc dsd dse dsp dss dst dta dtc dtd dte dtp dts dtt eaa eac ead eae eap eas eat ec- eca ecc ecd ece ecs ect ed- eda edc edd ede edp eds edt eea eec eed eee eep ees eet ep- epa epc epd epe epp eps ept es- esa esc esd ese esp ess est eta etc etd ete etp ets ett p-p paa pac pad pae pap pas pat pca pcc pcd pce pcp pcs pct pda pdc pdd pde pdp pds pdt pea pec ped pee pep pes pet ppa ppc ppd ppe ppp pps ppt ps- psa psc psd pse psp pss pst pt- pta ptc ptd pte ptp pts ptt saa sac sad sae sap sas sat sca scc scd sce scp scs sct sda sdc sdd sde sdp sds sdt se- sea sec sed see sep ses set spa spc spd spe spp sps spt ss- ssa ssc ssd sse ssp sss sst sta stc std ste stp sts stt taa tac tad tae tap tas tat tca tcc tcd tce tcp tcs tct tda tdc tdd tde tdp tds tdt te- tea tec ted tee tep tes tet tpa tpc tpd tpe tpp tps tpt tsa tsc tsd tse tsp tss tst tta ttc ttd tte ttp tts ttt