-ey a-a a-b aaa aab aad aae aau aay ab- aba abb abd abe abu aby ad- ada adb add ade adu ady aea aeb aed aee aeu aey au- aua aub aud aue ay- aya ayd aye ayu b-u baa bab bad bae bau bay bba bbb bbd bbe bbu bby bda bdb bdd bde bdu bdy be- bea beb bed bee beu bey bua bub bud bue buu buy by- bya byd bye byu daa dab dad dae dau day dba dbb dbd dbe dbu dby dda ddb ddd dde ddu ddy de- dea deb ded dee deu dey dua dub dud due duy dy- dya dyb dyd dye dyu dyy eaa eab ead eae eau eba ebb ebd ebe ebu eby ed- eda edb edd ede edu edy eea eeb eed eee eey eu- eua eub eud eue eya eyd eye ua- uaa uab uad uae uau uay uba ubb ube ubu uby uda udb udd ude udu uea ueb ued uee uey uua uue uuu uyu yaa yab yad yae yau yay ybe yby yda yde ydy yea yeb yed yee yey yua yud yue yuu yuy yyb yye yyu yyy