bbb bbd bbe bbn bbo bbx bdb bdd bde bdo bdx be- beb bed bee ben beo bex bnb bnd bne bnn bno bnx bob bod boe bon boo box bxb bxd bxn bxo bxx dbb dbd dbe dbn dbo dbx ddb ddd dde ddn ddo ddx de- deb ded dee den deo dex dnb dnd dne dnn dno dob dod doe don doo dox dxd dxn dxo dxx ebb ebd ebe ebn ebo ebx ed- edb edd ede edn edo edx eeb eed eee een eeo eex en- enb end ene enn eno eo- eob eod eoe eon eoo ex- exd exe exo exx nbb nbd nbe nbn nbo nbx ndb ndd nde ndn ndo ne- neb ned nee nen neo nex nnb nne nnn nno no- nob nod noe non noo nox nxd ob- obb obd obe obn obo obx odb odd ode odn odo oeb oed oee oen oeo oex on- onb ond one onn ono onx oo- oob ood oon ooo oox ox- oxb oxn oxo oxx xbe xbx xdb xde xed xee xen xex xno xod xon xoo xox xxo xxx