a-a aaa aae aaf aap aas aea aee aef aep aes af- afa afe aff afp afs ap- apa ape apf app aps as- asa ase asf asp ass eaa eae eaf eap eas eea eee eef eep ees ef- efa efe eff efp efs ep- epa epe epf epp eps es- esa ese esf esp ess faa fae faf fap fas fea fee fef fep fes ffa ffe fff ffp ffs fpa fpe fpp fps fsa fse fsf fsp fss p-p paa pae paf pap pas pea pee pef pep pes pfa pfe pff pfp pfs ppa ppe ppf ppp pps ps- psa pse psf psp pss saa sae saf sap sas se- sea see sef sep ses sfa sfe sff sfp sfs spa spe spf spp sps ss- ssa sse ssf ssp sss