a-a a-c aaa aac aae aam aao aap ac- aca acc ace acm aco acp aea aec aee aem aeo aep ama amc ame amm amo amp aoa aoc aoe aom aoo aop ap- apa apc ape apm apo app c-- caa cac cae cam cao cap cca ccc cce ccm cco ccp ce- cea cec cee cem ceo cep cma cmc cme cmm cmo cmp co- coa coc coe com coo cop cpa cpc cpe cpm cpo cpp eaa eac eae eam eao eap ec- eca ecc ece ecm eco eea eec eee eem eeo eep em- ema emc eme emm emo emp eo- eoa eoc eoe eom eoo eop ep- epa epc epe epm epo epp m-o maa mac mae mam mao map mc- mca mcc mce mcm mco mcp mea mec mee mem meo mep mma mmc mme mmm mmo mmp moa moc moe mom moo mop mpa mpc mpe mpm mpo mpp oaa oac oae oam oao oap oc- oca occ ocm oco ocp oea oec oee oem oeo oep om- oma omc ome omm omo omp oo- ooa ooc oom ooo oop op- opa opc ope opm opo opp p-p paa pac pae pam pao pap pca pcc pce pcm pco pcp pea pec pee pem peo pep pma pmc pme pmm pmo pmp poa poc poe pom poo pop ppa ppc ppe ppm ppo ppp