a-a aaa aae aaf aam aap aea aee aef aem aep af- afa afe aff afm afp ama ame amf amm amp ap- apa ape apf apm app eaa eae eaf eam eap eea eee eef eem eep ef- efa efe eff efm efp em- ema eme emf emm emp ep- epa epe epf epm epp faa fae faf fam fap fea fee fef fem fep ffa ffe fff ffm ffp fma fme fmf fmm fmp fpa fpe fpm fpp m-f maa mae maf mam map mea mee mef mem mep mfa mfe mff mfm mfp mma mme mmf mmm mmp mpa mpe mpf mpm mpp p-p paa pae paf pam pap pea pee pef pem pep pfa pfe pff pfm pfp pma pme pmf pmm pmp ppa ppe ppf ppm ppp