nwti wnti ntwi tnwi wtni twni nwit wnit niwt inwt wint iwnt ntiw tniw nitw intw tinw itnw wtin twin witn iwtn tiwn itwn
Note: these 'words' (valid or invalid) are all the permutations of the word nwti. These words are obtained by scrambling the letters in nwti.