bbb bbc bbd bbe bbm bbo bcb bcc bcd bce bcm bco bdb bdc bdd bde bdm bdo be- beb bec bed bee bem beo bmb bmc bmd bme bmm bmo bob boc bod boe bom boo c-- cbb cbc cbd cbe cbm cbo ccb ccc ccd cce ccm cco cdb cdc cdd cde cdm cdo ce- ceb cec ced cee cem ceo cmb cmc cmd cme cmm cmo co- cob coc cod coe com coo dbb dbc dbd dbe dbm dbo dcb dcc dcd dce dcm dco ddb ddc ddd dde ddm ddo de- deb dec ded dee dem deo dmb dmc dmd dme dmm dmo dob doc dod doe dom doo ebb ebc ebd ebe ebm ebo ec- ecb ecc ecd ece ecm eco ed- edb edc edd ede edm edo eeb eec eed eee eem eeo em- emb emc emd eme emm emo eo- eob eoc eod eoe eom eoo m-o mbb mbc mbd mbe mbm mbo mc- mcb mcc mcd mce mcm mco mdb mdc mdd mde mdm mdo meb mec med mee mem meo mmb mmc mmd mme mmm mmo mob moc mod moe mom moo ob- obb obc obd obe obm obo oc- ocb occ ocd ocm oco odb odc odd ode odm odo oeb oec oed oee oem oeo om- omb omc omd ome omm omo oo- oob ooc ood oom ooo