bbb bbd bbe bbm bbo bdb bdd bde bdm bdo be- beb bed bee bem beo bmb bmd bme bmm bmo bob bod boe bom boo dbb dbd dbe dbm dbo ddb ddd dde ddm ddo de- deb ded dee dem deo dmb dmd dme dmm dmo dob dod doe dom doo ebb ebd ebe ebm ebo ed- edb edd ede edm edo eeb eed eee eem eeo em- emb emd eme emm emo eo- eob eod eoe eom eoo m-o mbb mbd mbe mbm mbo mdb mdd mde mdm mdo meb med mee mem meo mmb mmd mme mmm mmo mob mod moe mom moo ob- obb obd obe obm obo odb odd ode odm odo oeb oed oee oem oeo om- omb omd ome omm omo oo- oob ood oom ooo