c-- ccc cce ccm cco ccp ccs cct ce- cec cee cem ceo cep ces cet cmc cme cmm cmo cmp cms cmt co- coc coe com coo cop cos cot cpc cpe cpm cpo cpp cps cpt csc cse csm cso csp css cst ctc cte ctm cto ctp cts ctt ec- ecc ece ecm eco ecs ect eec eee eem eeo eep ees eet em- emc eme emm emo emp ems emt eo- eoc eoe eom eoo eop eos eot ep- epc epe epm epo epp eps ept es- esc ese esm eso esp ess est etc ete etm eto etp ets ett m-o mc- mcc mce mcm mco mcp mcs mct mec mee mem meo mep mes met mmc mme mmm mmo mmp mms mmt moc moe mom moo mop mos mot mpc mpe mpm mpo mpp mps mpt msc mse msm mso msp mss mst mtc mte mtm mto mtp mts mtt oc- occ ocm oco ocp ocs oct oec oee oem oeo oep oes oet om- omc ome omm omo omp oms omt oo- ooc oom ooo oop oos oot op- opc ope opm opo opp ops opt os- osc ose osm oso osp oss ost ot- otc ote otm oto otp ots ott p-p pcc pce pcm pco pcp pcs pct pec pee pem peo pep pes pet pmc pme pmm pmo pmp pms pmt poc poe pom poo pop pos pot ppc ppe ppm ppo ppp pps ppt ps- psc pse psm pso psp pss pst pt- ptc pte ptm pto ptp pts ptt scc sce scm sco scp scs sct se- sec see sem seo sep ses set smc sme smm smo smp sms smt soc soe som soo sop sos sot spc spe spm spo spp sps spt ss- ssc sse ssm sso ssp sss sst stc ste stm sto stp sts stt tcc tce tcm tco tcp tcs tct te- tec tee tem teo tep tes tet tmc tme tmm tmo tmp tms tmt to- toc toe tom too top tos tot tpc tpe tpm tpo tpp tps tpt tsc tse tsm tso tsp tss tst ttc tte ttm tto ttp tts ttt