a-a a-b aaa aab aad aag aau aay ab- aba abb abd abg abu aby ad- ada adb add adg adu ady ag- aga agb agd agg agu agy au- aua aub aud aug ay- aya ayd ayu b-u baa bab bad bag bau bay bba bbb bbd bbg bbu bby bda bdb bdd bdg bdu bdy bga bgb bgd bgg bgu bua bub bud bug buu buy by- bya byd byg byu daa dab dad dag dau day dba dbb dbd dbg dbu dby dda ddb ddd ddg ddu ddy dga dgd dgg dgu dua dub dud dug duy dy- dya dyb dyd dyu dyy g-d gaa gab gad gag gau gay gba gbd gbg gbu gby gda gdb gdd gdu gga ggb ggd ggg ggu gu- gua gub gud gug guu guy gy- gya gyb gyd ua- uaa uab uad uag uau uay uba ubb ubg ubu uby uda udb udd udg udu uga ugb ugg ugu uua uug uuu uyu yaa yab yad yag yau yay ybg yby yda ydg ydy yga yua yud yug yuu yuy yyb yyg yyu yyy