-er -ey bbb bbc bbe bbk bbr bbs bby bcb bcc bce bck bcr bcs bcy be- beb bec bee bek ber bes bey bkb bkc bke bkk bkr bks brb bre brk brr brs bry bsb bsc bse bsk bsr bss bsy by- byc bye byk byr bys c-- cbb cbc cbe cbk cbr cbs cby ccb ccc cce cck ccr ccs ce- ceb cec cee cek cer ces cey ckb ckc cks cky crb crc cre crk crr crs cry csb csc cse csk csr css csy cyb cyc cye cyk cyr cys ebb ebc ebe ebk ebr ebs eby ec- ecb ecc ece eck ecr ecs eeb eec eee eek eer ees eey ekb ekc eke ekr eks eky erb erc ere erk err ers ery es- esb esc ese esk esr ess esy eyc eye eyr eys kbb kbc kbe kbk kbr kbs kcb kcc kce kck kcr kcs ke- keb kec kee kek ker kes key kkb kkc kke kkk kkr kks kky krc krk krr krs kry ksb ksc kse ksk ksr kss kyc kye kyr kys rbb rbc rbe rbk rbr rbs rcb rcc rce rcr rcs re- reb rec ree rek rer res rey rkb rkc rke rkk rks rky rrb rrc rrk rrr rrs rsb rsc rse rsk rsr rss ry- ryc rye ryk ryr rys ryy sbb sbc sbe sbk sbr sbs sby scb scc sce sck scr scs se- seb sec see sek ser ses sey sk- skb skc ske skk skr sks sky sr- srb src sre srk srr srs sry ss- ssb ssc sse ssk ssr sss sy- syb syc sye syk syr sys ybc ybe ybr ybs yby ycc yce ycs ycy yeb yec yee yek yer yes yey ykk yrc yre yrs ysb ysc yse ysk ysr yss ysy yyb yyc yye yys yyy