ssren ssren srsen rssen srsen rssen ssern ssern sesrn essrn sesrn essrn sresn rsesn sersn esrsn ressn erssn sresn rsesn sersn esrsn ressn erssn ssrne ssrne srsne rssne srsne rssne ssnre ssnre snsre nssre snsre nssre srnse rsnse snrse nsrse rnsse nrsse srnse rsnse snrse nsrse rnsse nrsse ssenr ssenr sesnr essnr sesnr essnr ssner ssner snser nsser snser nsser sensr esnsr snesr nsesr enssr nessr sensr esnsr snesr nsesr enssr nessr srens rsens serns esrns resns ersns srnes rsnes snres nsres rnses nrses senrs esnrs sners nsers ensrs nesrs renss ernss rness nress enrss nerss srens rsens serns esrns resns ersns srnes rsnes snres nsres rnses nrses senrs esnrs sners nsers ensrs nesrs renss ernss rness nress enrss nerss
Note: these 'words' (valid or invalid) are all the permutations of the word ssren. These words are obtained by scrambling the letters in ssren.