SPLEENIEST

el en es et in is it li ne pe pi si ti

eel els ens ess ins its lee lei les let lie lin lip lis lit nee net nil nip nit pee pen pes pet pie pin pis pit psi pst see sei sel sen set sin sip sis sit tee tel ten tie til tin tip tis

eels else epee eses esne isle lees leet leis lens lent lept less lest lets lien lies line lins lint lipe lips lisp list lite lits neep ness nest nets nils nips nite nits peel peen pees pein pele pelt pens pent pest pets pies pile pine pins pint piss pits plie psis psst seel seen seep sees seis sels sene sent sept sets silt sine sins sipe sips site sits slip slit snip snit spin spit step teel teen tees tele tels tens ties tile tils tine tins tips