b-u bbb bbk bbl bbm bbn bbs bbu bkb bkk bkl bkm bkn bks blb blk bll blm bln bls blu bmb bmk bml bmm bmn bms bmu bnb bnk bnl bnn bns bnu bsb bsk bsl bsm bsn bss bsu bub buk bul bum bun bus buu kbb kbk kbl kbm kbn kbs kbu kkb kkk kkl kkm kkn kks kku kl- klb klm kls klu kmb kmk kml kmm kms kmu kn- knk knl knm knn knu ksb ksk ksl ksm ksn kss ksu kub kuk kul kum kun kus kuu lbb lbk lbl lbm lbs lbu lkb lkl lks llb llk lll llm lln lls llu lmb lmk lml lmm lmn lms lmu lnb lnk lnl lnm lnn lns lnu lsb lsk lsl lsm lsn lss lsu lub luk lul lum lun lus luu mbb mbk mbl mbm mbs mbu mkb mkk mkl mkm mkn mks mku mlb mlk mll mlm mln mls mlu mmb mmk mml mmm mmn mms mmu mnb mnk mnl mnm mnn mns mnu msb msk msl msm msn mss msu mub muk mul mum mun mus muu nbb nbk nbl nbm nbn nbs nbu nkk nkm nkn nks nku nlb nlk nll nlm nln nls nlu nmb nmk nml nmm nmn nms nmu nnb nnk nnl nnm nnn nns nnu nsb nsk nsl nsm nsn nss nsu nub nuk nul num nun nus nuu sbb sbk sbl sbm sbn sbs sbu sk- skb skk skl skm sks sku slb slk sll slm sln sls slu smb smk sml smm smn sms smu snb snk snl snm snn sns snu ss- ssb ssk ssl ssm ssn sss ssu sub suk sul sum sun sus suu ubb ubk ubl ubn ubs ubu ukb ukk ukl ukn uku ulb ulk ull ulm uln uls ulu um- umb uml umm umn ums umu un- unb unk unl unm unn uns unu usb usk usl usm usn uss usu uum uun uus uuu