b-u bbb bbi bbm bbn bbs bbu bi- bib bii bim bin bis biu bmb bmi bmm bmn bms bmu bnb bni bnn bns bnu bsb bsi bsm bsn bss bsu bub bui bum bun bus buu ibb ibi ibm ibn ibs ibu iib iii iim iin iis iiu im- imb imi imm imn ims imu in- inb ini inm inn ins inu is- isb isi ism isn iss isu iu- iub iui ium ius mbb mbi mbm mbs mbu mi- mib mii mim min mis miu mmb mmi mmm mmn mms mmu mnb mni mnm mnn mns mnu msb msi msm msn mss msu mub mui mum mun mus muu n-i nbb nbi nbm nbn nbs nbu nib nii nim nin nis niu nmb nmi nmm nmn nms nmu nnb nni nnm nnn nns nnu nsb nsi nsm nsn nss nsu nub nui num nun nus nuu sbb sbi sbm sbn sbs sbu sib sii sim sin sis siu smb smi smm smn sms smu snb sni snm snn sns snu ss- ssb ssi ssm ssn sss ssu sub sui sum sun sus suu ubb ubi ubn ubs ubu uib uii uim uin uis uiu um- umb umi umm umn ums umu un- unb uni unm unn uns unu usb usi usm usn uss usu uum uun uus uuu