b-p bbb bbi bbm bbo bbp bi- bib bii bim bio bip bmb bmi bmm bmo bmp bob boi bom boo bop bpb bpi bpm bpo bpp ibb ibi ibm ibo ibp iib iii iim iio iip im- imb imi imm imo imp io- iob ioi iom ioo iop ipb ipi ipm ipo ipp m-o mbb mbi mbm mbo mbp mi- mib mii mim mio mip mmb mmi mmm mmo mmp mob moi mom moo mop mpb mpi mpm mpo mpp o-i ob- obb obi obm obo obp oib oii oim oio oip om- omb omi omm omo omp oo- oob ooi oom ooo oop op- opb opi opm opo opp p-p pbb pbi pbm pbo pbp pib pii pim pio pip pmb pmi pmm pmo pmp pob poi pom poo pop ppb ppi ppm ppo ppp