c-- ccc cce ccm cco ccp ce- cec cee cem ceo cep cmc cme cmm cmo cmp co- coc coe com coo cop cpc cpe cpm cpo cpp ec- ecc ece ecm eco eec eee eem eeo eep em- emc eme emm emo emp eo- eoc eoe eom eoo eop ep- epc epe epm epo epp m-o mc- mcc mce mcm mco mcp mec mee mem meo mep mmc mme mmm mmo mmp moc moe mom moo mop mpc mpe mpm mpo mpp oc- occ ocm oco ocp oec oee oem oeo oep om- omc ome omm omo omp oo- ooc oom ooo oop op- opc ope opm opo opp p-p pcc pce pcm pco pcp pec pee pem peo pep pmc pme pmm pmo pmp poc poe pom poo pop ppc ppe ppm ppo ppp