a-a a-t aaa aae aag aas aat aax aea aee aeg aes aet aex ag- aga age agg ags agt agx as- asa ase asg ass ast asx at- ata ate atg ats att atx ax- axa axe axs axt axx eaa eae eag eas eat eax eea eee eeg ees eet eex ega ege egg egs egt egx es- esa ese esg ess est esx eta ete etg ets ett etx ex- exa exe exs ext exx gaa gae gag gas gat ge- gea gee geg ges get gex gga ggg ggs ggt gsa gse gsg gss gst gsx gta gte gtg gts gtt gtx gxa gxs gxt saa sae sag sas sat sax se- sea see seg ses set sex sga sge sgg sgs sgt sgx ss- ssa sse ssg sss sst ssx sta ste stg sts stt stx sxs sxt t-x taa tae tag tas tat tax te- tea tee teg tes tet tex tga tge tgg tgs tgt tsa tse tsg tss tst tsx tta tte ttg tts ttt ttx txe txs txt xaa xag xas xat xee xeg xes xet xex xge xsa xss xst xts xtx xxx