b-u bbb bbd bbe bbo bbu bbx bdb bdd bde bdo bdu bdx be- beb bed bee beo beu bex bob bod boe boo bou box bub bud bue buo buu bux bxb bxd bxo bxx dbb dbd dbe dbo dbu dbx ddb ddd dde ddo ddu ddx de- deb ded dee deo deu dex dob dod doe doo dou dox dub dud due duo dux dxd dxo dxx ebb ebd ebe ebo ebu ebx ed- edb edd ede edo edu edx eeb eed eee eeo eex eo- eob eod eoe eoo eou eu- eub eud eue eux ex- exd exe exo exu exx ob- obb obd obe obo obu obx odb odd ode odo odu oeb oed oee oeo oex oo- oob ood ooo oox ou- oud oue ouo ox- oxb oxo oxx ubb ube ubo ubu ubx udb udd ude udo udu udx ueb ued uee uob uod uoe uoo uox uue uuu uxb uxo uxu xbe xbx xdb xde xed xee xeu xex xod xoo xox xue xxo xxx