a-a a-b aaa aab aad aag aau ab- aba abb abd abg abu ad- ada adb add adg adu ag- aga agb agd agg agu au- aua aub aud aug b-u baa bab bad bag bau bba bbb bbd bbg bbu bda bdb bdd bdg bdu bga bgb bgd bgg bgu bua bub bud bug buu daa dab dad dag dau dba dbb dbd dbg dbu dda ddb ddd ddg ddu dga dgd dgg dgu dua dub dud dug g-d gaa gab gad gag gau gba gbd gbg gbu gda gdb gdd gdu gga ggb ggd ggg ggu gu- gua gub gud gug guu ua- uaa uab uad uag uau uba ubb ubg ubu uda udb udd udg udu uga ugb ugg ugu uua uug uuu