a-a a-c aaa aac aae aam aap aas ac- aca acc ace acm acp acs aea aec aee aem aep aes ama amc ame amm amp ams ap- apa apc ape apm app aps as- asa asc ase asm asp ass c-- caa cac cae cam cap cas cca ccc cce ccm ccp ccs ce- cea cec cee cem cep ces cma cmc cme cmm cmp cms cpa cpc cpe cpm cpp cps csa csc cse csm csp css eaa eac eae eam eap eas ec- eca ecc ece ecm ecs eea eec eee eem eep ees em- ema emc eme emm emp ems ep- epa epc epe epm epp eps es- esa esc ese esm esp ess maa mac mae mam map mas mc- mca mcc mce mcm mcp mcs mea mec mee mem mep mes mma mmc mme mmm mmp mms mpa mpc mpe mpm mpp mps msa msc mse msm msp mss p-p paa pac pae pam pap pas pca pcc pce pcm pcp pcs pea pec pee pem pep pes pma pmc pme pmm pmp pms ppa ppc ppe ppm ppp pps ps- psa psc pse psm psp pss saa sac sae sam sap sas sca scc sce scm scp scs se- sea sec see sem sep ses sma smc sme smm smp sms spa spc spe spm spp sps ss- ssa ssc sse ssm ssp sss