-er -ey a-a a-b aaa aab aae aag aan aar aay ab- aba abb abe abg abn abr aby aea aeb aee aeg aen aer aey ag- aga agb age agg agn agr agy an- ana anb ane ang ann anr any ar- ara arb are arg arn arr ary ay- aya aye ayn ayr baa bab bae bag ban bar bay bba bbb bbe bbg bbn bbr bby be- bea beb bee beg ben ber bey bga bgb bge bgg bgn bgr bna bnb bne bng bnn bnr bra brb bre brg brn brr bry by- bya bye byg byn byr eaa eab eae eag ean ear eba ebb ebe ebg ebn ebr eby eea eeb eee eeg een eer eey ega egb ege egg egn egr egy en- ena enb ene eng enn enr eny era erb ere erg ern err ery eya eye eyn eyr gaa gab gae gag gan gar gay gba gbe gbg gbn gbr gby ge- gea geb gee geg gen ger gey gga ggb ggg ggn ggr gna gnb gne gnn gnr gra grb gre grg grn grr gry gy- gya gyb gye gyn gyr naa nab nae nag nan nar nay nba nbb nbe nbg nbn nbr ne- nea neb nee neg nen ner ney nga ngb nge ngg ngn nna nnb nne nng nnn nra nrb nre nrg nrn nrr nry nya nye nyg nyn nyy ra- raa rab rae rag ran rar ray rba rbb rbe rbg rbn rbr re- rea reb ree reg ren rer rey rga rgb rge rgg rgn rgr rna rnb rng rnn rnr rny rra rrb rrg rrn rrr ry- rya rye ryg ryn ryr ryy yaa yab yae yag yan yar yay ybe ybg ybr yby yea yeb yee yeg yen yer yey yga yna yne yng ynn yny yra yre yrg yrn yyb yye yyg yyy