b-u bbb bbk bbm bbn bbs bbu bkb bkk bkm bkn bks bmb bmk bmm bmn bms bmu bnb bnk bnn bns bnu bsb bsk bsm bsn bss bsu bub buk bum bun bus buu kbb kbk kbm kbn kbs kbu kkb kkk kkm kkn kks kku kmb kmk kmm kms kmu kn- knk knm knn knu ksb ksk ksm ksn kss ksu kub kuk kum kun kus kuu mbb mbk mbm mbs mbu mkb mkk mkm mkn mks mku mmb mmk mmm mmn mms mmu mnb mnk mnm mnn mns mnu msb msk msm msn mss msu mub muk mum mun mus muu nbb nbk nbm nbn nbs nbu nkk nkm nkn nks nku nmb nmk nmm nmn nms nmu nnb nnk nnm nnn nns nnu nsb nsk nsm nsn nss nsu nub nuk num nun nus nuu sbb sbk sbm sbn sbs sbu sk- skb skk skm sks sku smb smk smm smn sms smu snb snk snm snn sns snu ss- ssb ssk ssm ssn sss ssu sub suk sum sun sus suu ubb ubk ubn ubs ubu ukb ukk ukn uku um- umb umm umn ums umu un- unb unk unm unn uns unu usb usk usm usn uss usu uum uun uus uuu