b-u bbb bbd bbe bbk bbn bbo bbu bdb bdd bde bdk bdo bdu be- beb bed bee bek ben beo beu bkb bke bkk bkn bko bnb bnd bne bnk bnn bno bnu bob bod boe bok bon boo bou bub bud bue buk bun buo buu dbb dbd dbe dbk dbn dbo dbu ddb ddd dde ddk ddn ddo ddu de- deb ded dee dek den deo deu dkb dke dkk dko dku dnb dnd dne dnk dnn dno dob dod doe dok don doo dou dub dud due duk dun duo ebb ebd ebe ebk ebn ebo ebu ed- edb edd ede edk edn edo edu eeb eed eee eek een eeo ekb ekd eke eko eku en- enb end ene enk enn eno enu eo- eob eod eoe eok eon eoo eou eu- eub eud eue eun kbb kbd kbe kbk kbn kbo kbu kdb kde kdk kdo kdu ke- keb ked kee kek ken keo kkb kke kkk kkn kku kn- knd kne knk knn kno knu kob kod koe kok kon koo kou kub kud kue kuk kun kuu nbb nbd nbe nbk nbn nbo nbu ndb ndd nde ndk ndn ndo ndu ne- neb ned nee nek nen neo neu nke nkk nkn nko nku nnb nne nnk nnn nno nnu no- nob nod noe nok non noo nou nub nud nue nuk nun nuo nuu ob- obb obd obe obk obn obo obu odb odd ode odn odo odu oeb oed oee oen oeo okb okd oke okk oko oku on- onb ond one onk onn ono onu oo- oob ood ook oon ooo ou- oud oue ouk oun ouo ubb ube ubk ubn ubo ubu udb udd ude udk udn udo udu ueb ued uee uen ukb uke ukk ukn uku un- unb und une unk unn uno unu uob uod uoe uok uon uoo uue uun uuu