b-p bbb bbm bbo bbp bbs bbt bbx bmb bmm bmo bmp bms bmt bmx bob bom boo bop bos bot box bpb bpm bpo bpp bps bpt bpx bsb bsm bso bsp bss bst bsx btb btm bto btp bts btt btx bxb bxm bxo bxx m-o mbb mbm mbo mbp mbs mbt mbx mmb mmm mmo mmp mms mmt mmx mob mom moo mop mos mot mox mpb mpm mpo mpp mps mpt mpx msb msm mso msp mss mst msx mtb mtm mto mtp mts mtt mtx mxp mxs ob- obb obm obo obp obs obt obx om- omb omm omo omp oms omt omx oo- oob oom ooo oop oos oot oox op- opb opm opo opp ops opt opx os- osb osm oso osp oss ost osx ot- otb otm oto otp ots ott ox- oxb oxo oxt oxx p-p pbb pbm pbo pbp pbs pbt pbx pmb pmm pmo pmp pms pmt pmx pob pom poo pop pos pot pox ppb ppm ppo ppp pps ppt ppx ps- psb psm pso psp pss pst psx pt- ptb ptm pto ptp pts ptt ptx pxm pxs pxt sbb sbm sbo sbp sbs sbt sbx smb smm smo smp sms smt smx sob som soo sop sos sot sox spb spm spo spp sps spt spx ss- ssb ssm sso ssp sss sst ssx stb stm sto stp sts stt stx sxm sxs sxt t-x tbb tbm tbo tbp tbs tbt tmb tmm tmo tmp tms tmt tmx to- tob tom too top tos tot tox tpb tpm tpo tpp tps tpt tpx tsb tsm tso tsp tss tst tsx ttb ttm tto ttp tts ttt ttx txs txt xbx xmm xmo xmp xms xmt xmx xom xoo xop xos xot xox xpb xpm xpo xpp xps xpt xsb xsm xsp xss xst xtm xtp xts xtx xxo xxp xxx