-er -ey bbb bbc bbe bbo bbr bbs bby bcb bcc bce bco bcr bcs bcy be- beb bec bee beo ber bes bey bob boc boe boo bor bos boy brb bre bro brr brs bry bsb bsc bse bso bsr bss bsy by- byc bye byo byr bys c-- cbb cbc cbe cbo cbr cbs cby ccb ccc cce cco ccr ccs ce- ceb cec cee ceo cer ces cey co- cob coc coe coo cor cos coy crb crc cre cro crr crs cry csb csc cse cso csr css csy cyb cyc cye cyo cyr cys ebb ebc ebe ebo ebr ebs eby ec- ecb ecc ece eco ecr ecs eeb eec eee eeo eer ees eey eo- eob eoc eoe eoo eor eos erb erc ere ero err ers ery es- esb esc ese eso esr ess esy eyc eye eyo eyr eys ob- obb obc obe obo obr obs oby oc- ocb occ oco ocr ocs oeb oec oee oeo oer oes oey oo- oob ooc ooo oor oos or- orb orc ore oro orr ors ory os- osb osc ose oso osr oss oye oyo oys rbb rbc rbe rbo rbr rbs rcb rcc rce rco rcr rcs re- reb rec ree reo rer res rey rob roc roe roo ror ros roy rrb rrc rrr rrs rsb rsc rse rso rsr rss ry- ryc rye ryo ryr rys ryy sbb sbc sbe sbo sbr sbs sby scb scc sce sco scr scs se- seb sec see seo ser ses sey sob soc soe soo sor sos soy sr- srb src sre sro srr srs sry ss- ssb ssc sse sso ssr sss sy- syb syc sye syr sys ybc ybe ybr ybs yby ycc yce yco ycs ycy yeb yec yee yeo yer yes yey yob yoc yoe yoo yor yos yoy yrc yre yro yrs ysb ysc yse yso ysr yss ysy yyb yyc yye yys yyy