-er -ey bbb bbe bbk bbn bbr bbs bby be- beb bee bek ben ber bes bey bkb bke bkk bkn bkr bks bnb bne bnk bnn bnr bns brb bre brk brn brr brs bry bsb bse bsk bsn bsr bss bsy by- bye byk byn byr bys ebb ebe ebk ebn ebr ebs eby eeb eee eek een eer ees eey ekb eke ekr eks eky en- enb ene enk enn enr ens eny erb ere erk ern err ers ery es- esb ese esk esn esr ess esy eye eyn eyr eys kbb kbe kbk kbn kbr kbs ke- keb kee kek ken ker kes key kkb kke kkk kkn kkr kks kky kn- kne knk knn knr krk krn krr krs kry ksb kse ksk ksn ksr kss kye kyn kyr kys nbb nbe nbk nbn nbr nbs ne- neb nee nek nen ner nes ney nke nkk nkn nkr nks nky nnb nne nnk nnn nns nrb nre nrk nrn nrr nrs nry nsb nse nsk nsn nsr nss nsy nye nyk nyn nys nyy rbb rbe rbk rbn rbr rbs re- reb ree rek ren rer res rey rkb rke rkk rks rky rnb rnn rnr rns rny rrb rrk rrn rrr rrs rsb rse rsk rsn rsr rss ry- rye ryk ryn ryr rys ryy sbb sbe sbk sbn sbr sbs sby se- seb see sek sen ser ses sey sk- skb ske skk skr sks sky snb sne snk snn snr sns sny sr- srb sre srk srn srr srs sry ss- ssb sse ssk ssn ssr sss sy- syb sye syk syn syr sys ybe ybr ybs yby yeb yee yek yen yer yes yey ykk ykn yne ynk ynn yns yny yre yrn yrs ysb yse ysk ysr yss ysy yyb yye yys yyy