a-a a-b a-t aaa aab aae aag aas aat aau aax ab- aba abb abe abg abs abt abu abx aea aeb aee aeg aes aet aeu aex ag- aga agb age agg ags agt agu agx as- asa asb ase asg ass ast asu asx at- ata atb ate atg ats att atu atx au- aua aub aue aug aus aut aux ax- axa axe axs axt axx b-u baa bab bae bag bas bat bau bax bba bbb bbe bbg bbs bbt bbu bbx be- bea beb bee beg bes bet beu bex bga bgb bge bgg bgs bgt bgu bgx bsa bsb bse bsg bss bst bsu bsx bta btb bte btg bts btt btu btx bua bub bue bug bus but buu bux bxb bxx eaa eab eae eag eas eat eau eax eba ebb ebe ebg ebs ebt ebu ebx eea eeb eee eeg ees eet eex ega egb ege egg egs egt egu egx es- esa esb ese esg ess est esu esx eta etb ete etg ets ett etu etx eu- eua eub eue eug eus eut eux ex- exa exe exs ext exu exx gaa gab gae gag gas gat gau gba gbe gbg gbs gbt gbu gbx ge- gea geb gee geg ges get geu gex gga ggb ggg ggs ggt ggu gsa gsb gse gsg gss gst gsu gsx gta gtb gte gtg gts gtt gtu gtx gu- gua gub gue gug gus gut guu gxa gxs gxt saa sab sae sag sas sat sau sax sba sbb sbe sbg sbs sbt sbu sbx se- sea seb see seg ses set seu sex sga sgb sge sgg sgs sgt sgu sgx ss- ssa ssb sse ssg sss sst ssu ssx sta stb ste stg sts stt stu stx sua sub sue sug sus sut suu sux sxs sxt sxu t-x taa tab tae tag tas tat tau tax tba tbb tbe tbg tbs tbt tbu te- tea teb tee teg tes tet teu tex tga tgb tge tgg tgs tgt tgu tsa tsb tse tsg tss tst tsu tsx tta ttb tte ttg tts ttt ttu ttx tua tub tue tug tus tut tuu tux txe txs txt txu ua- uaa uab uae uag uas uat uau uba ubb ube ubg ubs ubt ubu ubx uea ueb uee ueg ues uet uga ugb uge ugg ugs ugt ugu ugx usa usb use usg uss ust usu usx uta utb ute uts utt utu utx uua uue uug uus uut uuu uxb uxt uxu xaa xag xas xat xau xbe xbx xee xeg xes xet xeu xex xge xsa xsb xss xst xts xtx xue xus xxx