a-a a-b a-t aaa aab aae aag aas aat aau ab- aba abb abe abg abs abt abu aea aeb aee aeg aes aet aeu ag- aga agb age agg ags agt agu as- asa asb ase asg ass ast asu at- ata atb ate atg ats att atu au- aua aub aue aug aus aut b-u baa bab bae bag bas bat bau bba bbb bbe bbg bbs bbt bbu be- bea beb bee beg bes bet beu bga bgb bge bgg bgs bgt bgu bsa bsb bse bsg bss bst bsu bta btb bte btg bts btt btu bua bub bue bug bus but buu eaa eab eae eag eas eat eau eba ebb ebe ebg ebs ebt ebu eea eeb eee eeg ees eet ega egb ege egg egs egt egu es- esa esb ese esg ess est esu eta etb ete etg ets ett etu eu- eua eub eue eug eus eut gaa gab gae gag gas gat gau gba gbe gbg gbs gbt gbu ge- gea geb gee geg ges get geu gga ggb ggg ggs ggt ggu gsa gsb gse gsg gss gst gsu gta gtb gte gtg gts gtt gtu gu- gua gub gue gug gus gut guu saa sab sae sag sas sat sau sba sbb sbe sbg sbs sbt sbu se- sea seb see seg ses set seu sga sgb sge sgg sgs sgt sgu ss- ssa ssb sse ssg sss sst ssu sta stb ste stg sts stt stu sua sub sue sug sus sut suu taa tab tae tag tas tat tau tba tbb tbe tbg tbs tbt tbu te- tea teb tee teg tes tet teu tga tgb tge tgg tgs tgt tgu tsa tsb tse tsg tss tst tsu tta ttb tte ttg tts ttt ttu tua tub tue tug tus tut tuu ua- uaa uab uae uag uas uat uau uba ubb ube ubg ubs ubt ubu uea ueb uee ueg ues uet uga ugb uge ugg ugs ugt ugu usa usb use usg uss ust usu uta utb ute uts utt utu uua uue uug uus uut uuu