b-u bbb bbi bbk bbn bbs bbu bi- bib bii bik bin bis biu bkb bkk bkn bks bnb bni bnk bnn bns bnu bsb bsi bsk bsn bss bsu bub bui buk bun bus buu ibb ibi ibk ibn ibs ibu iib iii iin iis iiu ikb iki ikk iks iku in- inb ini ink inn ins inu is- isb isi isk isn iss isu iu- iub iui ius kbb kbi kbk kbn kbs kbu kib kii kik kin kis kiu kkb kki kkk kkn kks kku kn- kni knk knn knu ksb ksi ksk ksn kss ksu kub kui kuk kun kus kuu n-i nbb nbi nbk nbn nbs nbu nib nii nik nin nis niu nki nkk nkn nks nku nnb nni nnk nnn nns nnu nsb nsi nsk nsn nss nsu nub nui nuk nun nus nuu sbb sbi sbk sbn sbs sbu sib sii sik sin sis siu sk- skb ski skk sks sku snb sni snk snn sns snu ss- ssb ssi ssk ssn sss ssu sub sui suk sun sus suu ubb ubi ubk ubn ubs ubu uib uii uin uis uiu ukb uki ukk ukn uku un- unb uni unk unn uns unu usb usi usk usn uss usu uun uus uuu