a-a a-c a-t aaa aac aad aae aan aap aas aat ac- aca acc acd ace acn acp acs act ad- ada adc add ade adn adp ads adt aea aec aed aee aen aep aes aet an- ana anc and ane ann anp ans ant ap- apa apc apd ape apn app aps apt as- asa asc asd ase asn asp ass ast at- ata atc atd ate atn atp ats att c-- caa cac cad cae can cap cas cat cca ccc ccd cce ccn ccp ccs cct cda cdc cdd cde cdn cdp cds cdt ce- cea cec ced cee cen cep ces cet cn- cna cnc cnd cne cnn cnp cns cnt cpa cpc cpd cpe cpn cpp cps cpt csa csc csd cse csn csp css cst cta ctc ctd cte ctn ctp cts ctt daa dac dad dae dan dap das dat dca dcc dcd dce dcn dcp dcs dct dda ddc ddd dde ddn ddp dds ddt de- dea dec ded dee den dep des det dna dnc dnd dne dnn dnp dns dnt dpa dpc dpd dpe dpn dpp dps dpt dsa dsc dsd dse dsn dsp dss dst dta dtc dtd dte dtn dtp dts dtt eaa eac ead eae ean eap eas eat ec- eca ecc ecd ece ecn ecs ect ed- eda edc edd ede edn edp eds edt eea eec eed eee een eep ees eet en- ena enc end ene enn enp ens ent ep- epa epc epd epe epn epp eps ept es- esa esc esd ese esn esp ess est eta etc etd ete etn etp ets ett naa nac nad nae nan nap nas nat nca ncc ncd nce ncn ncp ncs nct nda ndc ndd nde ndn ndp nds ndt ne- nea nec ned nee nen nep nes net nna nnc nne nnn nnp nns nnt npa npc npd npe npn npp nps npt nsa nsc nsd nse nsn nsp nss nst nta ntc ntd nte ntn ntp nts ntt p-p paa pac pad pae pan pap pas pat pca pcc pcd pce pcn pcp pcs pct pda pdc pdd pde pdn pdp pds pdt pea pec ped pee pen pep pes pet pn- pna pnc pnd pne pnn pnp pns pnt ppa ppc ppd ppe ppn ppp pps ppt ps- psa psc psd pse psn psp pss pst pt- pta ptc ptd pte ptn ptp pts ptt saa sac sad sae san sap sas sat sca scc scd sce scn scp scs sct sda sdc sdd sde sdn sdp sds sdt se- sea sec sed see sen sep ses set sna snc snd sne snn snp sns snt spa spc spd spe spn spp sps spt ss- ssa ssc ssd sse ssn ssp sss sst sta stc std ste stn stp sts stt taa tac tad tae tan tap tas tat tca tcc tcd tce tcn tcp tcs tct tda tdc tdd tde tdn tdp tds tdt te- tea tec ted tee ten tep tes tet tna tnc tnd tne tnn tnp tns tnt tpa tpc tpd tpe tpn tpp tps tpt tsa tsc tsd tse tsn tsp tss tst tta ttc ttd tte ttn ttp tts ttt