repps erpps rpeps preps eprps perps repps erpps rpeps preps eprps perps rppes prpes rppes prpes ppres ppres epprs peprs epprs peprs ppers ppers repsp erpsp rpesp presp eprsp persp respp erspp rsepp srepp esrpp serpp rpsep prsep rspep srpep psrep sprep epsrp pesrp esprp seprp pserp sperp repsp erpsp rpesp presp eprsp persp respp erspp rsepp srepp esrpp serpp rpsep prsep rspep srpep psrep sprep epsrp pesrp esprp seprp pserp sperp rppse prpse rppse prpse pprse pprse rpspe prspe rsppe srppe psrpe sprpe rpspe prspe rsppe srppe psrpe sprpe ppsre ppsre pspre sppre pspre sppre eppsr pepsr eppsr pepsr ppesr ppesr epspr pespr esppr seppr psepr spepr epspr pespr esppr seppr psepr spepr ppser ppser psper spper psper spper
Note: these 'words' (valid or invalid) are all the permutations of the word repps. These words are obtained by scrambling the letters in repps.