b-p bbb bbe bbm bbo bbp bbs bbt bbx be- beb bee bem beo bep bes bet bex bmb bme bmm bmo bmp bms bmt bmx bob boe bom boo bop bos bot box bpb bpe bpm bpo bpp bps bpt bpx bsb bse bsm bso bsp bss bst bsx btb bte btm bto btp bts btt btx bxb bxm bxo bxx ebb ebe ebm ebo ebp ebs ebt ebx eeb eee eem eeo eep ees eet eex em- emb eme emm emo emp ems emt emx eo- eob eoe eom eoo eop eos eot ep- epb epe epm epo epp eps ept epx es- esb ese esm eso esp ess est esx etb ete etm eto etp ets ett etx ex- exe exo exp exs ext exx m-o mbb mbe mbm mbo mbp mbs mbt mbx meb mee mem meo mep mes met mex mmb mme mmm mmo mmp mms mmt mmx mob moe mom moo mop mos mot mox mpb mpe mpm mpo mpp mps mpt mpx msb mse msm mso msp mss mst msx mtb mte mtm mto mtp mts mtt mtx mxp mxs ob- obb obe obm obo obp obs obt obx oeb oee oem oeo oep oes oet oex om- omb ome omm omo omp oms omt omx oo- oob oom ooo oop oos oot oox op- opb ope opm opo opp ops opt opx os- osb ose osm oso osp oss ost osx ot- otb ote otm oto otp ots ott ox- oxb oxo oxt oxx p-p pbb pbe pbm pbo pbp pbs pbt pbx peb pee pem peo pep pes pet pex pmb pme pmm pmo pmp pms pmt pmx pob poe pom poo pop pos pot pox ppb ppe ppm ppo ppp pps ppt ppx ps- psb pse psm pso psp pss pst psx pt- ptb pte ptm pto ptp pts ptt ptx pxe pxm pxs pxt sbb sbe sbm sbo sbp sbs sbt sbx se- seb see sem seo sep ses set sex smb sme smm smo smp sms smt smx sob soe som soo sop sos sot sox spb spe spm spo spp sps spt spx ss- ssb sse ssm sso ssp sss sst ssx stb ste stm sto stp sts stt stx sxm sxs sxt t-x tbb tbe tbm tbo tbp tbs tbt te- teb tee tem teo tep tes tet tex tmb tme tmm tmo tmp tms tmt tmx to- tob toe tom too top tos tot tox tpb tpe tpm tpo tpp tps tpt tpx tsb tse tsm tso tsp tss tst tsx ttb tte ttm tto ttp tts ttt ttx txe txs txt xbe xbx xee xem xep xes xet xex xmm xmo xmp xms xmt xmx xom xoo xop xos xot xox xpb xpe xpm xpo xpp xps xpt xsb xsm xsp xss xst xtm xtp xts xtx xxo xxp xxx