a-a a-c a-t aaa aac aad aae aaf aan aas aat ac- aca acc acd ace acf acn acs act ad- ada adc add ade adf adn ads adt aea aec aed aee aef aen aes aet af- afa afc afd afe aff afn afs aft an- ana anc and ane anf ann ans ant as- asa asc asd ase asf asn ass ast at- ata atc atd ate atf atn ats att c-- caa cac cad cae caf can cas cat cca ccc ccd cce ccf ccn ccs cct cda cdc cdd cde cdf cdn cds cdt ce- cea cec ced cee cef cen ces cet cfa cfc cfd cfe cff cfn cfs cft cn- cna cnc cnd cne cnf cnn cns cnt csa csc csd cse csf csn css cst cta ctc ctd cte ctf ctn cts ctt daa dac dad dae daf dan das dat dca dcc dcd dce dcf dcn dcs dct dda ddc ddd dde ddf ddn dds ddt de- dea dec ded dee def den des det dfa dfc dfd dfe dff dfn dfs dft dna dnc dnd dne dnf dnn dns dnt dsa dsc dsd dse dsf dsn dss dst dta dtc dtd dte dtf dtn dts dtt eaa eac ead eae eaf ean eas eat ec- eca ecc ecd ece ecf ecn ecs ect ed- eda edc edd ede edf edn eds edt eea eec eed eee eef een ees eet ef- efa efc efd efe eff efs eft en- ena enc end ene enf enn ens ent es- esa esc esd ese esf esn ess est eta etc etd ete etf etn ets ett faa fac fad fae faf fan fas fat fca fcc fcd fce fcf fcn fcs fct fda fdc fdd fde fdf fdn fds fdt fea fec fed fee fef fen fes fet ffa ffc ffd ffe fff ffn ffs fft fna fnc fnd fne fnf fnn fns fnt fsa fsc fsd fse fsf fsn fss fst fta ftc ftd fte ftf ftn fts ftt naa nac nad nae naf nan nas nat nca ncc ncd nce ncf ncn ncs nct nda ndc ndd nde ndf ndn nds ndt ne- nea nec ned nee nef nen nes net nfa nfc nfd nfe nff nfn nfs nft nna nnc nne nnf nnn nns nnt nsa nsc nsd nse nsf nsn nss nst nta ntc ntd nte ntf ntn nts ntt saa sac sad sae saf san sas sat sca scc scd sce scf scn scs sct sda sdc sdd sde sdf sdn sds sdt se- sea sec sed see sef sen ses set sfa sfc sfd sfe sff sfn sfs sft sna snc snd sne snf snn sns snt ss- ssa ssc ssd sse ssf ssn sss sst sta stc std ste stf stn sts stt taa tac tad tae taf tan tas tat tca tcc tcd tce tcf tcn tcs tct tda tdc tdd tde tdf tdn tds tdt te- tea tec ted tee tef ten tes tet tfa tfc tfd tfe tff tfn tfs tft tna tnc tnd tne tnf tnn tns tnt tsa tsc tsd tse tsf tsn tss tst tta ttc ttd tte ttf ttn tts ttt