a-a a-b a-t aaa aab aae aag aat aau ab- aba abb abe abg abt abu aea aeb aee aeg aet aeu ag- aga agb age agg agt agu at- ata atb ate atg att atu au- aua aub aue aug aut b-u baa bab bae bag bat bau bba bbb bbe bbg bbt bbu be- bea beb bee beg bet beu bga bgb bge bgg bgt bgu bta btb bte btg btt btu bua bub bue bug but buu eaa eab eae eag eat eau eba ebb ebe ebg ebt ebu eea eeb eee eeg eet ega egb ege egg egt egu eta etb ete etg ett etu eu- eua eub eue eug eut gaa gab gae gag gat gau gba gbe gbg gbt gbu ge- gea geb gee geg get geu gga ggb ggg ggt ggu gta gtb gte gtg gtt gtu gu- gua gub gue gug gut guu taa tab tae tag tat tau tba tbb tbe tbg tbt tbu te- tea teb tee teg tet teu tga tgb tge tgg tgt tgu tta ttb tte ttg ttt ttu tua tub tue tug tut tuu ua- uaa uab uae uag uat uau uba ubb ube ubg ubt ubu uea ueb uee ueg uet uga ugb uge ugg ugt ugu uta utb ute utt utu uua uue uug uut uuu