a-a a-b aaa aab aad aae aag aau ab- aba abb abd abe abg abu ad- ada adb add ade adg adu aea aeb aed aee aeg aeu ag- aga agb agd age agg agu au- aua aub aud aue aug b-u baa bab bad bae bag bau bba bbb bbd bbe bbg bbu bda bdb bdd bde bdg bdu be- bea beb bed bee beg beu bga bgb bgd bge bgg bgu bua bub bud bue bug buu daa dab dad dae dag dau dba dbb dbd dbe dbg dbu dda ddb ddd dde ddg ddu de- dea deb ded dee deg deu dga dgd dge dgg dgu dua dub dud due dug eaa eab ead eae eag eau eba ebb ebd ebe ebg ebu ed- eda edb edd ede edg edu eea eeb eed eee eeg ega egb egd ege egg egu eu- eua eub eud eue eug g-d gaa gab gad gae gag gau gba gbd gbe gbg gbu gda gdb gdd gde gdu ge- gea geb ged gee geg geu gga ggb ggd ggg ggu gu- gua gub gud gue gug guu ua- uaa uab uad uae uag uau uba ubb ube ubg ubu uda udb udd ude udg udu uea ueb ued uee ueg uga ugb uge ugg ugu uua uue uug uuu