bbb bbi bbk bbl bbn bbs bi- bib bii bik bil bin bis bkb bkk bkl bkn bks blb bli blk bll bln bls bnb bni bnk bnl bnn bns bsb bsi bsk bsl bsn bss ibb ibi ibk ibl ibn ibs iib iii iil iin iis ikb iki ikk ikl iks il- ilb ili ilk ill iln ils in- inb ini ink inl inn ins is- isb isi isk isl isn iss kbb kbi kbk kbl kbn kbs kib kii kik kil kin kis kkb kki kkk kkl kkn kks kl- klb kli kls kn- kni knk knl knn ksb ksi ksk ksl ksn kss lbb lbi lbk lbl lbs lib lii lik lil lin lis lkb lkl lks llb lli llk lll lln lls lnb lni lnk lnl lnn lns lsb lsi lsk lsl lsn lss n-i nbb nbi nbk nbl nbn nbs nib nii nik nil nin nis nki nkk nkn nks nlb nli nlk nll nln nls nnb nni nnk nnl nnn nns nsb nsi nsk nsl nsn nss sbb sbi sbk sbl sbn sbs sib sii sik sil sin sis sk- skb ski skk skl sks slb sli slk sll sln sls snb sni snk snl snn sns ss- ssb ssi ssk ssl ssn sss