-er -ey a-a a-b a-t aaa aab aae aag aar aat aay ab- aba abb abe abg abr abt aby aea aeb aee aeg aer aet aey ag- aga agb age agg agr agt agy ar- ara arb are arg arr art ary at- ata atb ate atg atr att ay- aya aye ayr ayt baa bab bae bag bar bat bay bba bbb bbe bbg bbr bbt bby be- bea beb bee beg ber bet bey bga bgb bge bgg bgr bgt bra brb bre brg brr brt bry bta btb bte btg btr btt bty by- bya bye byg byr byt eaa eab eae eag ear eat eba ebb ebe ebg ebr ebt eby eea eeb eee eeg eer eet eey ega egb ege egg egr egt egy era erb ere erg err ert ery eta etb ete etg etr ett ety eya eye eyr eyt gaa gab gae gag gar gat gay gba gbe gbg gbr gbt gby ge- gea geb gee geg ger get gey gga ggb ggg ggr ggt gra grb gre grg grr grt gry gta gtb gte gtg gtr gtt gty gy- gya gyb gye gyr ra- raa rab rae rag rar rat ray rba rbb rbe rbg rbr rbt re- rea reb ree reg rer ret rey rga rgb rge rgg rgr rgt rra rrb rrg rrr rrt rta rtb rte rtg rtr rtt rty ry- rya rye ryg ryr ryy taa tab tae tag tar tat tay tba tbb tbe tbg tbr tbt te- tea teb tee teg ter tet tey tga tgb tge tgg tgr tgt tgy tra trb tre trg trr trt try tta ttb tte ttg ttr ttt tty tya tye tyg tyr tyt yaa yab yae yag yar yat yay ybe ybg ybr yby yea yeb yee yeg yer yet yey yga yra yre yrg yrt yta yte ytr ytt yyb yye yyg yyt yyy