b-u bbb bbd bbe bbk bbn bbo bbu bdb bdd bde bdk bdo bdu bdz be- beb bed bee bek ben beo beu bez bkb bke bkk bkn bko bnb bnd bne bnk bnn bno bnu bnz bob bod boe bok bon boo bou boz bub bud bue buk bun buo buu buz bzd bze bzn bzo bzu bzz dbb dbd dbe dbk dbn dbo dbu dbz ddb ddd dde ddk ddn ddo ddu ddz de- deb ded dee dek den deo deu dez dkb dke dkk dko dku dnb dnd dne dnk dnn dno dnz dob dod doe dok don doo dou doz dub dud due duk dun duo duz dzb dzd dze dzo dzu 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 enz eo- eob eod eoe eok eon eoo eou eu- eub eud eue eun eze ezo ezz k-z kbb kbd kbe kbk kbn kbo kbu kbz kdb kde kdk kdo kdu ke- keb ked kee kek ken keo kez kkb kke kkk kkn kku kn- knd kne knk knn kno knu kob kod koe kok kon koo kou koz kub kud kue kuk kun kuu kzo nbb nbd nbe nbk nbn nbo nbu ndb ndd nde ndk ndn ndo ndu ne- neb ned nee nek nen neo neu nez nke nkk nkn nko nku nnb nne nnk nnn nno nnu nnz no- nob nod noe nok non noo nou noz nub nud nue nuk nun nuo nuu nzb nzd nze nzo nzz 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 oze ozo ozu ozz ubb ube ubk ubn ubo ubu udb udd ude udk udn udo udu ueb ued uee uen ukb uke ukk ukn uku ukz un- unb und une unk unn uno unu uob uod uoe uok uon uoo uue uun uuu uzb uzo uzu zbb zeb zed zee zek zen zeo zez znd zne znn zno zo- zob zod zoe zok zon zoo zou zub zud zuk zun zuz zzz