-ic a-a a-c a-i a-t aaa aac aae aag aai aan aas aat aax ac- aca acc ace acg aci acn acs act acx aea aec aee aeg aei aen aes aet aex ag- aga agc age agg agi agn ags agt agx ai- aia aic aie aig aii ain ais ait aix an- ana anc ane ang ani ann ans ant anx as- asa asc ase asg asi asn ass ast asx at- ata atc ate atg ati atn ats att atx ax- axa axe axi axn axs axt axx c-- caa cac cae cag cai can cas cat cax cca ccc cce ccg cci ccn ccs cct ccx ce- cea cec cee ceg cei cen ces cet cex cga cgc cge cgg cgi cgn cgs cgt ci- cia cic cie cig cii cin cis cit cix cn- cna cnc cne cng cni cnn cns cnt cnx csa csc cse csg csi csn css cst csx cta ctc cte ctg cti ctn cts ctt ctx cxc cxi cxs cxt cxx eaa eac eae eag eai ean eas eat eax ec- eca ecc ece ecg eci ecn ecs ect ecx eea eec eee eeg een ees eet eex ega egc ege egg egi egn egs egt egx eia eic eie eig eii ein eis eit eix en- ena enc ene eng eni enn ens ent es- esa esc ese esg esi esn ess est esx eta etc ete etg eti etn ets ett etx ex- exa exc exe exi exs ext exx gaa gac gae gag gai gan gas gat gca gcc gce gcg gci gcn gcs gct ge- gea gec gee geg gei gen ges get gex gga ggc ggg ggi ggn ggs ggt gia gic gie gig gii gin gis git gna gnc gne gni gnn gns gnt gsa gsc gse gsg gsi gsn gss gst gsx gta gtc gte gtg gti gtn gts gtt gtx gxa gxs gxt ia- iaa iac iae iag iai ian ias iat ica icc ice icg ici icn ics ict ie- iea iec iee ieg iei ien ies iet iex iga igc ige igg igi ign igs igt iia iic iie iii iin iis iit iix in- ina inc ine ing ini inn ins int inx is- isa isc ise isg isi isn iss ist ita itc ite itg iti itn its itt itx ixc ixe ixi ixn n-i naa nac nae nag nai nan nas nat nax nca ncc nce ncg nci ncn ncs nct ncx ne- nea nec nee neg nei nen nes net nex nga ngc nge ngg ngi ngn ngs ngt nia nic nie nig nii nin nis nit nix nna nnc nne nng nni nnn nns nnt nsa nsc nse nsg nsi nsn nss nst nsx nta ntc nte ntg nti ntn nts ntt ntx nxc nxt saa sac sae sag sai san sas sat sax sca scc sce scg sci scn scs sct scx se- sea sec see seg sei sen ses set sex sga sgc sge sgg sgi sgn sgs sgt sgx sia sic sie sig sii sin sis sit six sna snc sne sng sni snn sns snt ss- ssa ssc sse ssg ssi ssn sss sst ssx sta stc ste stg sti stn sts stt stx sxc sxi sxn sxs sxt t-x taa tac tae tag tai tan tas tat tax tca tcc tce tcg tci tcn tcs tct tcx te- tea tec tee teg tei ten tes tet tex tga tgc tge tgg tgi tgn tgs tgt tia tic tie tig tii tin tis tit tix tna tnc tne tng tni tnn tns tnt tnx tsa tsc tse tsg tsi tsn tss tst tsx tta ttc tte ttg tti ttn tts ttt ttx txe txi txn txs txt xaa xac xag xan xas xat xci xcx xee xeg xen xes xet xex xge xgi xia xic xie xii xin xis xit xix xna xnc xns xsa xsc xsi xss xst xtc xti xts xtx xxi xxx