bbb bbc bbe bbm bbo bbx bcb bcc bce bcm bco bcx be- beb bec bee bem beo bex bmb bmc bme bmm bmo bmx bob boc boe bom boo box bxb bxm bxo bxx c-- cbb cbc cbe cbm cbo cbx ccb ccc cce ccm cco ccx ce- ceb cec cee cem ceo cex cmb cmc cme cmm cmo cmx co- cob coc coe com coo cox cxc cxo cxx ebb ebc ebe ebm ebo ebx ec- ecb ecc ece ecm eco ecx eeb eec eee eem eeo eex em- emb emc eme emm emo emx eo- eob eoc eoe eom eoo ex- exc exe exo exx m-o mbb mbc mbe mbm mbo mbx mc- mcb mcc mce mcm mco mcx meb mec mee mem meo mex mmb mmc mme mmm mmo mmx mob moc moe mom moo mox mxc ob- obb obc obe obm obo obx oc- ocb occ ocm oco ocx oeb oec oee oem oeo oex om- omb omc ome omm omo omx oo- oob ooc oom ooo oox ox- oxb oxc oxo oxx xbc xbe xbx xcb xcx xee xem xex xmc xmm xmo xmx xoc xom xoo xox xxo xxx