-er -ey bbb bbc bbe bbm bbo bbr bby bcb bcc bce bcm bco bcr bcy be- beb bec bee bem beo ber bey bmb bmc bme bmm bmo bmr bob boc boe bom boo bor boy brb bre brm bro brr bry by- byc bye bym byo byr c-- cbb cbc cbe cbm cbo cbr cby ccb ccc cce ccm cco ccr ce- ceb cec cee cem ceo cer cey cmb cmc cme cmm cmo cmr cmy co- cob coc coe com coo cor coy crb crc cre crm cro crr cry cyb cyc cye cym cyo cyr ebb ebc ebe ebm ebo ebr eby ec- ecb ecc ece ecm eco ecr eeb eec eee eem eeo eer eey em- emb emc eme emm emo emr eo- eob eoc eoe eom eoo eor erb erc ere erm ero err ery eyc eye eym eyo eyr m-o m-r mbb mbc mbe mbm mbo mbr mc- mcb mcc mce mcm mco mcr meb mec mee mem meo mer mey mmb mmc mme mmm mmo mmr mob moc moe mom moo mor moy mrb mrc mre mrm mro mrr mry my- myb myc mye mym myo myr ob- obb obc obe obm obo obr oby oc- ocb occ ocm oco ocr oeb oec oee oem oeo oer oey om- omb omc ome omm omo omr omy oo- oob ooc oom ooo oor or- orb orc ore orm oro orr ory oye oyo rbb rbc rbe rbm rbo rbr rcb rcc rce rcm rco rcr re- reb rec ree rem reo rer rey rmb rmc rme rmm rmo rmr rob roc roe rom roo ror roy rrb rrc rrm rrr ry- ryc rye rym ryo ryr ryy ybc ybe ybm ybr yby ycc yce yco ycy yeb yec yee yem yeo yer yey ymc yme ymm ymo yob yoc yoe yom yoo yor yoy yrc yre yro yyb yyc yye yyy