bbb bbi bbm bbn bbr bbx bi- bib bii bim bin bir bix bmb bmi bmm bmn bmr bmx bnb bni bnn bnr bnx brb bri brm brn brr brx bxb bxi bxm bxn bxx ibb ibi ibm ibn ibr ibx iib iii iim iin iir iix im- imb imi imm imn imx in- inb ini inm inn inr inx ir- irb iri irm irn irr irx ixi ixn m-r mbb mbi mbm mbr mbx mi- mib mii mim min mir mix mmb mmi mmm mmn mmr mmx mnb mni mnm mnn mnr mrb mri mrm mrn mrr mrx mxi mxn mxr n-i nbb nbi nbm nbn nbr nbx nib nii nim nin nir nix nmb nmi nmm nmn nmr nnb nni nnm nnn nrb nri nrm nrn nrr nrx rbb rbi rbm rbn rbr rbx rib rii rim rin rir rix rmb rmi rmm rmn rmr rmx rnb rni rnm rnn rnr rrb rri rrm rrn rrr rxr xbr xbx xii xin xix xmi xmm xmr xmx xrx xxi xxx