c-- ccc cce cck ccm cco ccp ce- cec cee cek cem ceo cep ckc ckm cko cmc cme cmk cmm cmo cmp co- coc coe cok com coo cop cpc cpe cpk cpm cpo cpp ec- ecc ece eck ecm eco eec eee eek eem eeo eep ekc eke eko ekp em- emc eme emk emm emo emp eo- eoc eoe eok eom eoo eop ep- epc epe epm epo epp kcc kce kck kcm kcp ke- kec kee kek kem keo kep kkc kke kkk kkm kkp kmc kme kmk kmm kmo kmp koc koe kok kom koo kop kpc kpe kpk kpm kpo kpp m-o mc- mcc mce mck mcm mco mcp mec mee mek mem meo mep mkc mke mkk mkm mko mkp mmc mme mmk mmm mmo mmp moc moe mok mom moo mop mpc mpe mpk mpm mpo mpp oc- occ ock ocm oco ocp oec oee oem oeo oep okc oke okk oko okp om- omc ome omm omo omp oo- ooc ook oom ooo oop op- opc ope opk opm opo opp p-p pcc pce pck pcm pco pcp pec pee pek pem peo pep pkc pke pkm pko pkp pmc pme pmk pmm pmo pmp poc poe pok pom poo pop ppc ppe ppk ppm ppo ppp