bbb bbi bbk bbl bbn bbx bi- bib bii bik bil bin bix bkb bkk bkl bkn bkx blb bli blk bll bln blx bnb bni bnk bnl bnn bnx bxb bxi bxl bxn bxx ibb ibi ibk ibl ibn ibx iib iii iil iin iix ikb iki ikk ikl ikx il- ilb ili ilk ill iln ilx in- inb ini ink inl inn inx ixi ixl ixn kbb kbi kbk kbl kbn kbx kib kii kik kil kin kix kkb kki kkk kkl kkn kl- klb kli klx kn- kni knk knl knn knx kxl lbb lbi lbk lbl lbx lib lii lik lil lin lix lkb lkl llb lli llk lll lln lnb lni lnk lnl lnn lxi lxx n-i nbb nbi nbk nbl nbn nbx nib nii nik nil nin nix nki nkk nkn nlb nli nlk nll nln nlx nnb nni nnk nnl nnn nxl xbl xbx xii xin xix xkb xkl xlb xli xnk xxi xxl xxx