a-a a-b a-q aaa aab aad aak aaq aau aay ab- aba abb abd abk abq abu aby ad- ada adb add adk adq adu ady aka akb akd akk aku aqa au- aua aub aud auk ay- aya ayd ayk ayu b-u baa bab bad bak baq bau bay bba bbb bbd bbk bbq bbu bby bda bdb bdd bdk bdq bdu bdy bka bkb bkk bkq bqd bua bub bud buk buu buy by- bya byd byk byq byu daa dab dad dak daq dau day dba dbb dbd dbk dbq dbu dby dda ddb ddd ddk ddq ddu ddy dka dkb dkk dku dqa 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 kqa kub kud kuk kuu kuy kya kyd kyu qaa qad qau qba qbd qbq qda qdb qqk qqq qqu qu- qua qud quy ua- uaa uab uad uak uaq 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 yqb yua yud yuk yuu yuy yyb yyu yyy