b-p bbb bbm bbo bbp bbt bmb bmm bmo bmp bmt bob bom boo bop bot bpb bpm bpo bpp bpt btb btm bto btp btt m-o mbb mbm mbo mbp mbt mmb mmm mmo mmp mmt mob mom moo mop mot mpb mpm mpo mpp mpt mtb mtm mto mtp mtt ob- obb obm obo obp obt om- omb omm omo omp omt oo- oob oom ooo oop oot op- opb opm opo opp opt ot- otb otm oto otp ott p-p pbb pbm pbo pbp pbt pmb pmm pmo pmp pmt pob pom poo pop pot ppb ppm ppo ppp ppt pt- ptb ptm pto ptp ptt tbb tbm tbo tbp tbt tmb tmm tmo tmp tmt to- tob tom too top tot tpb tpm tpo tpp tpt ttb ttm tto ttp ttt