-er -ey a-a a-b a-t aaa aab aae aar aas aat aay ab- aba abb abe abr abs abt aby aea aeb aee aer aes aet aey ar- ara arb are arr ars art ary as- asa asb ase asr ass ast asy at- ata atb ate atr ats att ay- aya aye ayr ays ayt baa bab bae bar bas bat bay bba bbb bbe bbr bbs bbt bby be- bea beb bee ber bes bet bey bra brb bre brr brs brt bry bsa bsb bse bsr bss bst bsy bta btb bte btr bts btt bty by- bya bye byr bys byt eaa eab eae ear eas eat eba ebb ebe ebr ebs ebt eby eea eeb eee eer ees eet eey era erb ere err ers ert ery es- esa esb ese esr ess est esy eta etb ete etr ets ett ety eya eye eyr eys eyt ra- raa rab rae rar ras rat ray rba rbb rbe rbr rbs rbt re- rea reb ree rer res ret rey rra rrb rrr rrs rrt rsa rsb rse rsr rss rst rta rtb rte rtr rts rtt rty ry- rya rye ryr rys ryy saa sab sae sar sas sat say sba sbb sbe sbr sbs sbt sby se- sea seb see ser ses set sey sr- sra srb sre srr srs srt sry ss- ssa ssb sse ssr sss sst sta stb ste str sts stt sty sy- sya syb sye syr sys syt taa tab tae tar tas tat tay tba tbb tbe tbr tbs tbt te- tea teb tee ter tes tet tey tra trb tre trr trs trt try tsa tsb tse tsr tss tst tsy tta ttb tte ttr tts ttt tty tya tye tyr tys tyt yaa yab yae yar yas yat yay ybe ybr ybs yby yea yeb yee yer yes yet yey yra yre yrs yrt ysa ysb yse ysr yss yst ysy yta yte ytr yts ytt yyb yye yys yyt yyy