-er -ey bbb bbe bbn bbr bbs bbt bby be- beb bee ben ber bes bet bey bnb bne bnn bnr bns bnt brb bre brn brr brs brt bry bsb bse bsn bsr bss bst bsy btb bte btn btr bts btt bty by- bye byn byr bys byt ebb ebe ebn ebr ebs ebt eby eeb eee een eer ees eet eey en- enb ene enn enr ens ent eny erb ere ern err ers ert ery es- esb ese esn esr ess est esy etb ete etn etr ets ett ety eye eyn eyr eys eyt nbb nbe nbn nbr nbs nbt ne- neb nee nen ner nes net ney nnb nne nnn nns nnt nrb nre nrn nrr nrs nrt nry nsb nse nsn nsr nss nst nsy ntb nte ntn ntr nts ntt nye nyn nys nyt nyy rbb rbe rbn rbr rbs rbt re- reb ree ren rer res ret rey rnb rnn rnr rns rnt rny rrb rrn rrr rrs rrt rsb rse rsn rsr rss rst rtb rte rtn rtr rts rtt rty ry- rye ryn ryr rys ryy sbb sbe sbn sbr sbs sbt sby se- seb see sen ser ses set sey snb sne snn snr sns snt sny sr- srb sre srn srr srs srt sry ss- ssb sse ssn ssr sss sst stb ste stn str sts stt sty sy- syb sye syn syr sys syt tbb tbe tbn tbr tbs tbt te- teb tee ten ter tes tet tey tnb tne tnn tnr tns tnt trb tre trn trr trs trt try tsb tse tsn tsr tss tst tsy ttb tte ttn ttr tts ttt tty tye tyn tyr tys tyt ybe ybr ybs yby yeb yee yen yer yes yet yey yne ynn yns yny yre yrn yrs yrt ysb yse ysr yss yst ysy yte ytn ytr yts ytt yyb yye yys yyt yyy