a-a a-b aaa aab aad aag aak aau aay ab- aba abb abd abg abk abu aby ad- ada adb add adg adk adu ady ag- aga agb agd agg agk agu agy aka akb akd akg akk aku au- aua aub aud aug auk ay- aya ayd ayk ayu b-u baa bab bad bag bak bau bay bba bbb bbd bbg bbk bbu bby bda bdb bdd bdg bdk bdu bdy bga bgb bgd bgg bgk bgu bka bkb bkg bkk bua bub bud bug buk buu buy by- bya byd byg byk byu daa dab dad dag dak dau day dba dbb dbd dbg dbk dbu dby dda ddb ddd ddg ddk ddu ddy dga dgd dgg dgk dgu dka dkb dkg dkk dku dua dub dud dug duk duy dy- dya dyb dyd dyk dyu dyy g-d gaa gab gad gag gak gau gay gba gbd gbg gbk gbu gby gda gdb gdd gdk gdu gga ggb ggd ggg ggu gka gkb gkd gu- gua gub gud gug guk guu guy gy- gya gyb gyd ka- kaa kab kad kag kak kau kay kba kbb kbd kbk kbu kda kdb kdg kdk kdu kdy kga kgb kgd kgu kgy kkb kkk kku kky kub kud kug kuk kuu kuy kya kyd kyu ua- uaa uab uad uag uak uau uay uba ubb ubg ubk ubu uby uda udb udd udg udk udu uga ugb ugg ugk ugu uka ukb ukk uku uua uug uuu uyu yaa yab yad yag yak yau yay ybg yby yda ydg ydy yga yka ykk yua yud yug yuk yuu yuy yyb yyg yyu yyy