b-p bbb bbc bbe bbm bbo bbp bbs bbt bcb bcc bce bcm bco bcp bcs bct be- beb bec bee bem beo bep bes bet bmb bmc bme bmm bmo bmp bms bmt bob boc boe bom boo bop bos bot bpb bpc bpe bpm bpo bpp bps bpt bsb bsc bse bsm bso bsp bss bst btb btc bte btm bto btp bts btt c-- cbb cbc cbe cbm cbo cbp cbs cbt ccb ccc cce ccm cco ccp ccs cct ce- ceb cec cee cem ceo cep ces cet cmb cmc cme cmm cmo cmp cms cmt co- cob coc coe com coo cop cos cot cpb cpc cpe cpm cpo cpp cps cpt csb csc cse csm cso csp css cst ctb ctc cte ctm cto ctp cts ctt ebb ebc ebe ebm ebo ebp ebs ebt ec- ecb ecc ece ecm eco ecs ect eeb eec eee eem eeo eep ees eet em- emb emc eme emm emo emp ems emt eo- eob eoc eoe eom eoo eop eos eot ep- epb epc epe epm epo epp eps ept es- esb esc ese esm eso esp ess est etb etc ete etm eto etp ets ett m-o mbb mbc mbe mbm mbo mbp mbs mbt mc- mcb mcc mce mcm mco mcp mcs mct meb mec mee mem meo mep mes met mmb mmc mme mmm mmo mmp mms mmt mob moc moe mom moo mop mos mot mpb mpc mpe mpm mpo mpp mps mpt msb msc mse msm mso msp mss mst mtb mtc mte mtm mto mtp mts mtt ob- obb obc obe obm obo obp obs obt oc- ocb occ ocm oco ocp ocs oct oeb oec oee oem oeo oep oes oet om- omb omc ome omm omo omp oms omt oo- oob ooc oom ooo oop oos oot op- opb opc ope opm opo opp ops opt os- osb osc ose osm oso osp oss ost ot- otb otc ote otm oto otp ots ott p-p pbb pbc pbe pbm pbo pbp pbs pbt pcb pcc pce pcm pco pcp pcs pct peb pec pee pem peo pep pes pet pmb pmc pme pmm pmo pmp pms pmt pob poc poe pom poo pop pos pot ppb ppc ppe ppm ppo ppp pps ppt ps- psb psc pse psm pso psp pss pst pt- ptb ptc pte ptm pto ptp pts ptt sbb sbc sbe sbm sbo sbp sbs sbt scb scc sce scm sco scp scs sct se- seb sec see sem seo sep ses set smb smc sme smm smo smp sms smt sob soc soe som soo sop sos sot spb spc spe spm spo spp sps spt ss- ssb ssc sse ssm sso ssp sss sst stb stc ste stm sto stp sts stt tbb tbc tbe tbm tbo tbp tbs tbt tcb tcc tce tcm tco tcp tcs tct te- teb tec tee tem teo tep tes tet tmb tmc tme tmm tmo tmp tms tmt to- tob toc toe tom too top tos tot tpb tpc tpe tpm tpo tpp tps tpt tsb tsc tse tsm tso tsp tss tst ttb ttc tte ttm tto ttp tts ttt