b-p bbb bbe bbm bbo bbp be- beb bee bem beo bep bmb bme bmm bmo bmp bob boe bom boo bop bpb bpe bpm bpo bpp ebb ebe ebm ebo ebp eeb eee eem eeo eep em- emb eme emm emo emp eo- eob eoe eom eoo eop ep- epb epe epm epo epp m-o mbb mbe mbm mbo mbp meb mee mem meo mep mmb mme mmm mmo mmp mob moe mom moo mop mpb mpe mpm mpo mpp ob- obb obe obm obo obp oeb oee oem oeo oep om- omb ome omm omo omp oo- oob oom ooo oop op- opb ope opm opo opp p-p pbb pbe pbm pbo pbp peb pee pem peo pep pmb pme pmm pmo pmp pob poe pom poo pop ppb ppe ppm ppo ppp