bbb bbc bbd bbe bbk bbm bbo bcb bcc bcd bce bck bcm bco bdb bdc bdd bde bdk bdm bdo be- beb bec bed bee bek bem beo bkb bkc bke bkk bkm bko bmb bmc bmd bme bmk bmm bmo bob boc bod boe bok bom boo c-- cbb cbc cbd cbe cbk cbm cbo ccb ccc ccd cce cck ccm cco cdb cdc cdd cde cdk cdm cdo ce- ceb cec ced cee cek cem ceo ckb ckc ckd ckm cko cmb cmc cmd cme cmk cmm cmo co- cob coc cod coe cok com coo dbb dbc dbd dbe dbk dbm dbo dcb dcc dcd dce dck dcm dco ddb ddc ddd dde ddk ddm ddo de- deb dec ded dee dek dem deo dkb dkc dke dkk dkm dko dmb dmc dmd dme dmk dmm dmo dob doc dod doe dok dom doo ebb ebc ebd ebe ebk ebm ebo ec- ecb ecc ecd ece eck ecm eco ed- edb edc edd ede edk edm edo eeb eec eed eee eek eem eeo ekb ekc ekd eke eko em- emb emc emd eme emk emm emo eo- eob eoc eod eoe eok eom eoo kbb kbc kbd kbe kbk kbm kbo kcb kcc kcd kce kck kcm kdb kdc kde kdk kdm kdo ke- keb kec ked kee kek kem keo kkb kkc kke kkk kkm kmb kmc kmd kme kmk kmm kmo kob koc kod koe kok kom koo m-o mbb mbc mbd mbe mbk mbm mbo mc- mcb mcc mcd mce mck mcm mco mdb mdc mdd mde mdk mdm mdo meb mec med mee mek mem meo mkb mkc mkd mke mkk mkm mko mmb mmc mmd mme mmk mmm mmo mob moc mod moe mok mom moo ob- obb obc obd obe obk obm obo oc- ocb occ ocd ock ocm oco odb odc odd ode odm odo oeb oec oed oee oem oeo okb okc okd oke okk oko om- omb omc omd ome omm omo oo- oob ooc ood ook oom ooo