b-u bbb bbe bbk bbl bbm bbn bbu be- beb bee bek bel bem ben beu bkb bke bkk bkl bkm bkn blb ble blk bll blm bln blu bmb bme bmk bml bmm bmn bmu bnb bne bnk bnl bnn bnu bub bue buk bul bum bun buu ebb ebe ebk ebl ebm ebn ebu eeb eee eek eel eem een ekb eke ekl eku elb ele elk ell elm eln elu em- emb eme emk eml emm emn emu en- enb ene enk enl enm enn enu eu- eub eue eul eun kbb kbe kbk kbl kbm kbn kbu ke- keb kee kek kel kem ken kkb kke kkk kkl kkm kkn kku kl- klb klm klu kmb kme kmk kml kmm kmu kn- kne knk knl knm knn knu kub kue kuk kul kum kun kuu lbb lbe lbk lbl lbm lbu leb lee lek lel lem len leu lkb lkl llb lle llk lll llm lln llu lmb lme lmk lml lmm lmn lmu lnb lne lnk lnl lnm lnn lnu lub lue luk lul lum lun luu mbb mbe mbk mbl mbm mbu meb mee mek mel mem men meu mkb mke mkk mkl mkm mkn mku mlb mle mlk mll mlm mln mlu mmb mme mmk mml mmm mmn mmu mnb mne mnk mnl mnm mnn mnu mub mue muk mul mum mun muu nbb nbe nbk nbl nbm nbn nbu ne- neb nee nek nel nem nen neu nke nkk nkm nkn nku nlb nle nlk nll nlm nln nlu nmb nme nmk nml nmm nmn nmu nnb nne nnk nnl nnm nnn nnu nub nue nuk nul num nun nuu ubb ube ubk ubl ubn ubu ueb uee uel uem uen ukb uke ukk ukl ukn uku ulb ule ulk ull ulm uln ulu um- umb ume uml umm umn umu un- unb une unk unl unm unn unu uue uum uun uuu