-er -ey bbb bbe bbk bbm bbo bbr bby be- beb bee bek bem beo ber bey bkb bke bkk bkm bko bkr bmb bme bmk bmm bmo bmr bob boe bok bom boo bor boy brb bre brk brm bro brr bry by- bye byk bym byo byr ebb ebe ebk ebm ebo ebr eby eeb eee eek eem eeo eer eey ekb eke eko ekr eky em- emb eme emk emm emo emr eo- eob eoe eok eom eoo eor erb ere erk erm ero err ery eye eym eyo eyr kbb kbe kbk kbm kbo kbr ke- keb kee kek kem keo ker key kkb kke kkk kkm kkr kky kmb kme kmk kmm kmo kob koe kok kom koo kor koy krk kro krr kry kye kym kyo kyr m-o m-r mbb mbe mbk mbm mbo mbr meb mee mek mem meo mer mey mkb mke mkk mkm mko mkr mky mmb mme mmk mmm mmo mmr mob moe mok mom moo mor moy mrb mre mrk mrm mro mrr mry my- myb mye myk mym myo myr ob- obb obe obk obm obo obr oby oeb oee oem oeo oer oey okb oke okk oko okr om- omb ome omm omo omr omy oo- oob ook oom ooo oor or- orb ore ork orm oro orr ory oye oyo rbb rbe rbk rbm rbo rbr re- reb ree rek rem reo rer rey rkb rke rkk rkm rko rky rmb rme rmm rmo rmr rob roe rok rom roo ror roy rrb rrk rrm rrr ry- rye ryk rym ryo ryr ryy ybe ybm ybr yby yeb yee yek yem yeo yer yey ykk ykm yme ymm ymo yob yoe yok yom yoo yor yoy yre yro yyb yye yyy