b-u bbb bbi bbl bbn bbs bbu bi- bib bii bil bin bis biu blb bli bll bln bls blu bnb bni bnl bnn bns bnu bsb bsi bsl bsn bss bsu bub bui bul bun bus buu ibb ibi ibl ibn ibs ibu iib iii iil iin iis iiu il- ilb ili ill iln ils ilu in- inb ini inl inn ins inu is- isb isi isl isn iss isu iu- iub iui ius lbb lbi lbl lbs lbu lib lii lil lin lis liu llb lli lll lln lls llu lnb lni lnl lnn lns lnu lsb lsi lsl lsn lss lsu lub lui lul lun lus luu n-i nbb nbi nbl nbn nbs nbu nib nii nil nin nis niu nlb nli nll nln nls nlu nnb nni nnl nnn nns nnu nsb nsi nsl nsn nss nsu nub nui nul nun nus nuu sbb sbi sbl sbn sbs sbu sib sii sil sin sis siu slb sli sll sln sls slu snb sni snl snn sns snu ss- ssb ssi ssl ssn sss ssu sub sui sul sun sus suu ubb ubi ubl ubn ubs ubu uib uii uil uin uis uiu ulb uli ull uln uls ulu un- unb uni unl unn uns unu usb usi usl usn uss usu uun uus uuu