a-a a-c a-t aaa aac aad aae aan aas aat ac- aca acc acd ace acn acs act ad- ada adc add ade adn ads adt aea aec aed aee aen aes aet an- ana anc and ane ann ans ant as- asa asc asd ase asn ass ast at- ata atc atd ate atn ats att c-- caa cac cad cae can cas cat cca ccc ccd cce ccn ccs cct cda cdc cdd cde cdn cds cdt ce- cea cec ced cee cen ces cet cn- cna cnc cnd cne cnn cns cnt csa csc csd cse csn css cst cta ctc ctd cte ctn cts ctt daa dac dad dae dan das dat dca dcc dcd dce dcn dcs dct dda ddc ddd dde ddn dds ddt de- dea dec ded dee den des det dna dnc dnd dne dnn dns dnt dsa dsc dsd dse dsn dss dst dta dtc dtd dte dtn dts dtt eaa eac ead eae ean eas eat ec- eca ecc ecd ece ecn ecs ect ed- eda edc edd ede edn eds edt eea eec eed eee een ees eet en- ena enc end ene enn ens ent es- esa esc esd ese esn ess est eta etc etd ete etn ets ett naa nac nad nae nan nas nat nca ncc ncd nce ncn ncs nct nda ndc ndd nde ndn nds ndt ne- nea nec ned nee nen nes net nna nnc nne nnn nns nnt nsa nsc nsd nse nsn nss nst nta ntc ntd nte ntn nts ntt saa sac sad sae san sas sat sca scc scd sce scn scs sct sda sdc sdd sde sdn sds sdt se- sea sec sed see sen ses set sna snc snd sne snn sns snt ss- ssa ssc ssd sse ssn sss sst sta stc std ste stn sts stt taa tac tad tae tan tas tat tca tcc tcd tce tcn tcs tct tda tdc tdd tde tdn tds tdt te- tea tec ted tee ten tes tet tna tnc tnd tne tnn tns tnt tsa tsc tsd tse tsn tss tst tta ttc ttd tte ttn tts ttt