bbb bbd bbe bbo bbx bdb bdd bde bdo bdx be- beb bed bee beo bex bob bod boe boo box bxb bxd bxo bxx dbb dbd dbe dbo dbx ddb ddd dde ddo ddx de- deb ded dee deo dex dob dod doe doo dox dxd dxo dxx ebb ebd ebe ebo ebx ed- edb edd ede edo edx eeb eed eee eeo eex eo- eob eod eoe eoo ex- exd exe exo exx ob- obb obd obe obo obx odb odd ode odo oeb oed oee oeo oex oo- oob ood ooo oox ox- oxb oxo oxx xbe xbx xdb xde xed xee xex xod xoo xox xxo xxx