-er -ey a-a a-b a-t aaa aab aae aan aar aat aay ab- aba abb abe abn abr abt aby aea aeb aee aen aer aet aey an- ana anb ane ann anr ant any ar- ara arb are arn arr art ary at- ata atb ate atn atr att ay- aya aye ayn ayr ayt baa bab bae ban bar bat bay bba bbb bbe bbn bbr bbt bby be- bea beb bee ben ber bet bey bna bnb bne bnn bnr bnt bra brb bre brn brr brt bry bta btb bte btn btr btt bty by- bya bye byn byr byt eaa eab eae ean ear eat eba ebb ebe ebn ebr ebt eby eea eeb eee een eer eet eey en- ena enb ene enn enr ent eny era erb ere ern err ert ery eta etb ete etn etr ett ety eya eye eyn eyr eyt naa nab nae nan nar nat nay nba nbb nbe nbn nbr nbt ne- nea neb nee nen ner net ney nna nnb nne nnn nnt nra nrb nre nrn nrr nrt nry nta ntb nte ntn ntr ntt nya nye nyn nyt nyy ra- raa rab rae ran rar rat ray rba rbb rbe rbn rbr rbt re- rea reb ree ren rer ret rey rna rnb rnn rnr rnt rny rra rrb rrn rrr rrt rta rtb rte rtn rtr rtt rty ry- rya rye ryn ryr ryy taa tab tae tan tar tat tay tba tbb tbe tbn tbr tbt te- tea teb tee ten ter tet tey tna tnb tne tnn tnr tnt tra trb tre trn trr trt try tta ttb tte ttn ttr ttt tty tya tye tyn tyr tyt yaa yab yae yan yar yat yay ybe ybr yby yea yeb yee yen yer yet yey yna yne ynn yny yra yre yrn yrt yta yte ytn ytr ytt yyb yye yyt yyy