-ey bbb bbc bbe bbm bbo bby bcb bcc bce bcm bco bcy be- beb bec bee bem beo bey bmb bmc bme bmm bmo bob boc boe bom boo boy by- byc bye bym byo c-- cbb cbc cbe cbm cbo cby ccb ccc cce ccm cco ce- ceb cec cee cem ceo cey cmb cmc cme cmm cmo cmy co- cob coc coe com coo coy cyb cyc cye cym cyo ebb ebc ebe ebm ebo eby ec- ecb ecc ece ecm eco eeb eec eee eem eeo eey em- emb emc eme emm emo eo- eob eoc eoe eom eoo eyc eye eym eyo m-o mbb mbc mbe mbm mbo mc- mcb mcc mce mcm mco meb mec mee mem meo mey mmb mmc mme mmm mmo mob moc moe mom moo moy my- myb myc mye mym myo ob- obb obc obe obm obo oby oc- ocb occ ocm oco oeb oec oee oem oeo oey om- omb omc ome omm omo omy oo- oob ooc oom ooo oye oyo ybc ybe ybm yby ycc yce yco ycy yeb yec yee yem yeo yey ymc yme ymm ymo yob yoc yoe yom yoo yoy yyb yyc yye yyy