a-a a-c aaa aac aae aam aao aap aas ac- aca acc ace acm aco acp acs aea aec aee aem aeo aep aes ama amc ame amm amo amp ams aoa aoc aoe aom aoo aop aos ap- apa apc ape apm apo app aps as- asa asc ase asm aso asp ass c-- caa cac cae cam cao cap cas cca ccc cce ccm cco ccp ccs ce- cea cec cee cem ceo cep ces cma cmc cme cmm cmo cmp cms co- coa coc coe com coo cop cos cpa cpc cpe cpm cpo cpp cps csa csc cse csm cso csp css eaa eac eae eam eao eap eas ec- eca ecc ece ecm eco ecs eea eec eee eem eeo eep ees em- ema emc eme emm emo emp ems eo- eoa eoc eoe eom eoo eop eos ep- epa epc epe epm epo epp eps es- esa esc ese esm eso esp ess m-o maa mac mae mam mao map mas mc- mca mcc mce mcm mco mcp mcs mea mec mee mem meo mep mes mma mmc mme mmm mmo mmp mms moa moc moe mom moo mop mos mpa mpc mpe mpm mpo mpp mps msa msc mse msm mso msp mss oaa oac oae oam oao oap oas oc- oca occ ocm oco ocp ocs oea oec oee oem oeo oep oes om- oma omc ome omm omo omp oms oo- ooa ooc oom ooo oop oos op- opa opc ope opm opo opp ops os- osa osc ose osm oso osp oss p-p paa pac pae pam pao pap pas pca pcc pce pcm pco pcp pcs pea pec pee pem peo pep pes pma pmc pme pmm pmo pmp pms poa poc poe pom poo pop pos ppa ppc ppe ppm ppo ppp pps ps- psa psc pse psm pso psp pss saa sac sae sam sao sap sas sca scc sce scm sco scp scs se- sea sec see sem seo sep ses sma smc sme smm smo smp sms soa soc soe som soo sop sos spa spc spe spm spo spp sps ss- ssa ssc sse ssm sso ssp sss