reran erran rrean rrean erran reran rearn erarn raern arern earrn aerrn rraen rraen raren arren raren arren erarn rearn earrn aerrn raern arern rerna errna rrena rrena errna rerna renra ernra rnera nrera enrra nerra rrnea rrnea rnrea nrrea rnrea nrrea ernra renra enrra nerra rnera nrera reanr eranr raenr arenr earnr aernr renar ernar rnear nrear enrar nerar raner arner rnaer nraer anrer narer eanrr aenrr enarr nearr anerr naerr rrane rrane rarne arrne rarne arrne rrnae rrnae rnrae nrrae rnrae nrrae ranre arnre rnare nrare anrre narre ranre arnre rnare nrare anrre narre eranr reanr earnr aernr raenr arenr ernar renar enrar nerar rnear nrear eanrr aenrr enarr nearr anerr naerr raner arner rnaer nraer anrer narer
Note: these 'words' (valid or invalid) are all the permutations of the word reran. These words are obtained by scrambling the letters in reran.