-ey a-a a-b aaa aab aad aae aag aay ab- aba abb abd abe abg aby ad- ada adb add ade adg ady aea aeb aed aee aeg aey ag- aga agb agd age agg agy ay- aya ayd aye baa bab bad bae bag bay bba bbb bbd bbe bbg bby bda bdb bdd bde bdg bdy be- bea beb bed bee beg bey bga bgb bgd bge bgg by- bya byd bye byg daa dab dad dae dag day dba dbb dbd dbe dbg dby dda ddb ddd dde ddg ddy de- dea deb ded dee deg dey dga dgd dge dgg dy- dya dyb dyd dye dyy eaa eab ead eae eag eba ebb ebd ebe ebg eby ed- eda edb edd ede edg edy eea eeb eed eee eeg eey ega egb egd ege egg egy eya eyd eye g-d gaa gab gad gae gag gay gba gbd gbe gbg gby gda gdb gdd gde ge- gea geb ged gee geg gey gga ggb ggd ggg gy- gya gyb gyd gye yaa yab yad yae yag yay ybe ybg yby yda yde ydg ydy yea yeb yed yee yeg yey yga yyb yye yyg yyy