a-a a-b aaa aab aad aak aau aay ab- aba abb abd abk abu aby ad- ada adb add adk adu ady aka akb akd akk aku au- aua aub aud auk ay- aya ayd ayk ayu b-u baa bab bad bak bau bay bba bbb bbd bbk bbu bby bda bdb bdd bdk bdu bdy bka bkb bkk bua bub bud buk buu buy by- bya byd byk byu daa dab dad dak dau day dba dbb dbd dbk dbu dby dda ddb ddd ddk ddu ddy dka dkb dkk dku dua dub dud duk duy dy- dya dyb dyd dyk dyu dyy ka- kaa kab kad kak kau kay kba kbb kbd kbk kbu kda kdb kdk kdu kdy kkb kkk kku kky kub kud kuk kuu kuy kya kyd kyu ua- uaa uab uad uak uau uay uba ubb ubk ubu uby uda udb udd udk udu uka ukb ukk uku uua uuu uyu yaa yab yad yak yau yay yby yda ydy yka ykk yua yud yuk yuu yuy yyb yyu yyy