b-p bbb bbi bbm bbp bbr bi- bib bii bim bip bir bmb bmi bmm bmp bmr bpb bpi bpm bpp bpr brb bri brm brp brr ibb ibi ibm ibp ibr iib iii iim iip iir im- imb imi imm imp ipb ipi ipm ipp ipr ir- irb iri irm irp irr m-r mbb mbi mbm mbp mbr mi- mib mii mim mip mir mmb mmi mmm mmp mmr mpb mpi mpm mpp mpr mrb mri mrm mrp mrr p-p pbb pbi pbm pbp pbr pib pii pim pip pir pmb pmi pmm pmp pmr ppb ppi ppm ppp ppr prb pri prm prp prr rbb rbi rbm rbp rbr rib rii rim rip rir rmb rmi rmm rmp rmr rpb rpi rpm rpp rpr rrb rri rrm rrp rrr