a-a aaa aae aam aap aas aea aee aem aep aes ama ame amm amp ams ap- apa ape apm app aps as- asa ase asm asp ass eaa eae eam eap eas eea eee eem eep ees em- ema eme emm emp ems ep- epa epe epm epp eps es- esa ese esm esp ess maa mae mam map mas mea mee mem mep mes mma mme mmm mmp mms mpa mpe mpm mpp mps msa mse msm msp mss p-p paa pae pam pap pas pea pee pem pep pes pma pme pmm pmp pms ppa ppe ppm ppp pps ps- psa pse psm psp pss saa sae sam sap sas se- sea see sem sep ses sma sme smm smp sms spa spe spm spp sps ss- ssa sse ssm ssp sss