b-u bbb bbd bbe bbn bbo bbu bdb bdd bde bdo bdu be- beb bed bee ben beo beu bnb bnd bne bnn bno bnu bob bod boe bon boo bou bub bud bue bun buo buu dbb dbd dbe dbn dbo dbu ddb ddd dde ddn ddo ddu de- deb ded dee den deo deu dnb dnd dne dnn dno dob dod doe don doo dou dub dud due dun duo ebb ebd ebe ebn ebo ebu ed- edb edd ede edn edo edu eeb eed eee een eeo en- enb end ene enn eno enu eo- eob eod eoe eon eoo eou eu- eub eud eue eun nbb nbd nbe nbn nbo nbu ndb ndd nde ndn ndo ndu ne- neb ned nee nen neo neu nnb nne nnn nno nnu no- nob nod noe non noo nou nub nud nue nun nuo nuu ob- obb obd obe obn obo obu odb odd ode odn odo odu oeb oed oee oen oeo on- onb ond one onn ono onu oo- oob ood oon ooo ou- oud oue oun ouo ubb ube ubn ubo ubu udb udd ude udn udo udu ueb ued uee uen un- unb und une unn uno unu uob uod uoe uon uoo uue uun uuu