-ey a-a a-b a-t aaa aab aae aag aat aay ab- aba abb abe abg abt aby aea aeb aee aeg aet aey ag- aga agb age agg agt agy at- ata atb ate atg att ay- aya aye ayt baa bab bae bag bat bay bba bbb bbe bbg bbt bby be- bea beb bee beg bet bey bga bgb bge bgg bgt bta btb bte btg btt bty by- bya bye byg byt eaa eab eae eag eat eba ebb ebe ebg ebt eby eea eeb eee eeg eet eey ega egb ege egg egt egy eta etb ete etg ett ety eya eye eyt gaa gab gae gag gat gay gba gbe gbg gbt gby ge- gea geb gee geg get gey gga ggb ggg ggt gta gtb gte gtg gtt gty gy- gya gyb gye taa tab tae tag tat tay tba tbb tbe tbg tbt te- tea teb tee teg tet tey tga tgb tge tgg tgt tgy tta ttb tte ttg ttt tty tya tye tyg tyt yaa yab yae yag yat yay ybe ybg yby yea yeb yee yeg yet yey yga yta yte ytt yyb yye yyg yyt yyy