eeee eees eeps eese eesi eiei eies eise eiss epee epes epi- epie epip epis eppp epps epsi epsp epss esee eses esie esis espe espi espp esps esse essi essp ieie iesi iies iiie iiii iiis iisi iisp ipes ipie ipse ipsi ipsp ipss isee isep ises isie isis ispe isps isse issi issp isss peep pees peip peis pepe pepi peps pese pesi pess piep pies piip pipe pipi pipp pips pise pisi piss ppie pppp ppps ppss psei psip psis pspi pspp psps psse s-ii se-e se-i se-s seep sees seie seii seip seis sepe sepi sepp seps sese sesi sess sies sipe sipi sipp sips sise sisi siss spee spes spie spip spis spps spse spsp spss ssee ssep sses ssis sspe ssps sssi ssss