pells eplls plels lpels elpls lepls pells eplls plels lpels elpls lepls plles lples plles lples llpes llpes ellps lelps ellps lelps lleps lleps pelsl eplsl plesl lpesl elpsl lepsl pesll epsll psell spell espll sepll plsel lpsel pslel splel lspel slpel elspl lespl eslpl selpl lsepl slepl pelsl eplsl plesl lpesl elpsl lepsl pesll epsll psell spell espll sepll plsel lpsel pslel splel lspel slpel elspl lespl eslpl selpl lsepl slepl pllse lplse pllse lplse llpse llpse plsle lpsle pslle splle lsple slple plsle lpsle pslle splle lsple slple llspe llspe lslpe sllpe lslpe sllpe ellsp lelsp ellsp lelsp llesp llesp elslp leslp esllp sellp lselp slelp elslp leslp esllp sellp lselp slelp llsep llsep lslep sllep lslep sllep
Note: these 'words' (valid or invalid) are all the permutations of the word pells. These words are obtained by scrambling the letters in pells.