-er -ey a-a a-b a-i a-t aaa aab aae aag aai aar aat aay ab- aba abb abe abg abi abr abt aby aea aeb aee aeg aei aer aet aey ag- aga agb age agg agi agr agt agy ai- aia aib aie aig aii air ait aiy ar- ara arb are arg ari arr art ary at- ata atb ate atg ati atr att ay- aya aye ayi ayr ayt baa bab bae bag bai bar bat bay bba bbb bbe bbg bbi bbr bbt bby be- bea beb bee beg bei ber bet bey bga bgb bge bgg bgi bgr bgt bi- bia bib bie big bii bir bit biy bra brb bre brg bri brr brt bry bta btb bte btg bti btr btt bty by- bya bye byg byi byr byt eaa eab eae eag eai ear eat eba ebb ebe ebg ebi ebr ebt eby eea eeb eee eeg eer eet eey ega egb ege egg egi egr egt egy eia eib eie eig eii eir eit era erb ere erg eri err ert ery eta etb ete etg eti etr ett ety eya eye eyr eyt gaa gab gae gag gai gar gat gay gba gbe gbg gbi gbr gbt gby ge- gea geb gee geg gei ger get gey gga ggb ggg ggi ggr ggt gia gib gie gig gii gir git giy gra grb gre grg gri grr grt gry gta gtb gte gtg gti gtr gtt gty gy- gya gyb gye gyr ia- iaa iab iae iag iai iar iat iba ibb ibe ibg ibi ibr ibt iby ie- iea iee ieg iei ier iet iey iga igb ige igg igi igr igt igy iia iib iie iii iir iit ir- ira irb ire irg iri irr irt iry ita itb ite itg iti itt ity iya iye iyr iyt iyy ra- raa rab rae rag rai rar rat ray rba rbb rbe rbg rbi rbr rbt re- rea reb ree reg rei rer ret rey rga rgb rge rgg rgi rgr rgt ria rib rie rig rii rir rit riy rra rrb rrg rri rrr rrt rta rtb rte rtg rti rtr rtt rty ry- rya rye ryg ryr ryy taa tab tae tag tai tar tat tay tba tbb tbe tbg tbi tbr tbt te- tea teb tee teg tei ter tet tey tga tgb tge tgg tgi tgr tgt tgy tia tib tie tig tii tir tit tiy tra trb tre trg tri trr trt try tta ttb tte ttg tti ttr ttt tty tya tye tyg tyr tyt yaa yab yae yag yai yar yat yay ybe ybg ybi ybr yby yea yeb yee yeg yei yer yet yey yga yie yig yii yir yit yra yre yrg yrt yta yte ytr ytt yyb yye yyg yyt yyy