b-p bbb bbe bbi bbm bbp be- beb bee bei bem bep bi- bib bie bii bim bip bmb bme bmi bmm bmp bpb bpe bpi bpm bpp ebb ebe ebi ebm ebp eeb eee eem eep eib eie eii eim eip em- emb eme emi emm emp ep- epb epe epi epm epp ibb ibe ibi ibm ibp ie- iee iei iem iep iib iie iii iim iip im- imb ime imi imm imp ipb ipe ipi ipm ipp mbb mbe mbi mbm mbp meb mee mei mem mep mi- mib mie mii mim mip mmb mme mmi mmm mmp mpb mpe mpi mpm mpp p-p pbb pbe pbi pbm pbp peb pee pei pem pep pib pie pii pim pip pmb pme pmi pmm pmp ppb ppe ppi ppm ppp