b-p bbb bbm bbo bbp bbs bbt bmb bmm bmo bmp bms bmt bob bom boo bop bos bot bpb bpm bpo bpp bps bpt bsb bsm bso bsp bss bst btb btm bto btp bts btt m-o mbb mbm mbo mbp mbs mbt mmb mmm mmo mmp mms mmt mob mom moo mop mos mot mpb mpm mpo mpp mps mpt msb msm mso msp mss mst mtb mtm mto mtp mts mtt ob- obb obm obo obp obs obt om- omb omm omo omp oms omt oo- oob oom ooo oop oos oot op- opb opm opo opp ops opt os- osb osm oso osp oss ost ot- otb otm oto otp ots ott p-p pbb pbm pbo pbp pbs pbt pmb pmm pmo pmp pms pmt pob pom poo pop pos pot ppb ppm ppo ppp pps ppt ps- psb psm pso psp pss pst pt- ptb ptm pto ptp pts ptt sbb sbm sbo sbp sbs sbt smb smm smo smp sms smt sob som soo sop sos sot spb spm spo spp sps spt ss- ssb ssm sso ssp sss sst stb stm sto stp sts stt tbb tbm tbo tbp tbs tbt tmb tmm tmo tmp tms tmt to- tob tom too top tos tot tpb tpm tpo tpp tps tpt tsb tsm tso tsp tss tst ttb ttm tto ttp tts ttt