-er -ey bbb bbe bbf bbm bbo bbr bbs bby be- beb bee bef bem beo ber bes bey bfb bfe bff bfm bfo bfr bfs bfy bmb bme bmf bmm bmo bmr bms bob boe bof bom boo bor bos boy brb bre brf brm bro brr brs bry bsb bse bsf bsm bso bsr bss bsy by- bye byf bym byo byr bys ebb ebe ebf ebm ebo ebr ebs eby eeb eee eef eem eeo eer ees eey ef- efb efe eff efm efo efr efs em- emb eme emf emm emo emr ems eo- eob eoe eof eom eoo eor eos erb ere erf erm ero err ers ery es- esb ese esf esm eso esr ess esy eye eym eyo eyr eys fbb fbe fbf fbm fbo fbr fbs feb fee fef fem feo fer fes fey ffe fff ffm ffo ffr ffs ffy fmb fme fmf fmm fmo fmr fms fob foe fof fom foo for fos foy frb fre frf frm fro frr frs fry fsb fse fsf fsm fso fsr fss fy- fyb fye fyo m-f m-o m-r mbb mbe mbf mbm mbo mbr mbs meb mee mef mem meo mer mes mey mfb mfe mff mfm mfo mfr mfs mfy mmb mme mmf mmm mmo mmr mms mob moe mof mom moo mor mos moy mrb mre mrf mrm mro mrr mrs mry msb mse msf msm mso msr mss msy my- myb mye myf mym myo myr mys ob- obb obe obf obm obo obr obs oby oeb oee oef oem oeo oer oes oey of- ofb ofe off ofm ofo ofr ofs om- omb ome omf omm omo omr oms omy oo- oob oof oom ooo oor oos or- orb ore orf orm oro orr ors ory os- osb ose osf osm oso osr oss oye oyo oys rbb rbe rbf rbm rbo rbr rbs re- reb ree ref rem reo rer res rey rfb rfe rff rfm rfo rfr rfs rmb rme rmf rmm rmo rmr rms rob roe rof rom roo ror ros roy rrb rrf rrm rrr rrs rsb rse rsf rsm rso rsr rss ry- rye ryf rym ryo ryr rys ryy sbb sbe sbf sbm sbo sbr sbs sby se- seb see sef sem seo ser ses sey sfb sfe sff sfm sfo sfr sfs smb sme smf smm smo smr sms smy sob soe sof som soo sor sos soy sr- srb sre srf srm sro srr srs sry ss- ssb sse ssf ssm sso ssr sss sy- syb sye sym syr sys ybe ybf ybm ybr ybs yby yeb yee yef yem yeo yer yes yey yfe yff yfm yfr yfs yme ymm ymo yms yob yoe yof yom yoo yor yos yoy yre yrf yro yrs ysb yse ysm yso ysr yss ysy yyb yye yyf yys yyy