twits wtits tiwts itwts witts iwtts twtis wttis ttwis ttwis wttis twtis titws ittws ttiws ttiws ittws titws witts iwtts wtits twits itwts tiwts twist wtist tiwst itwst witst iwtst twsit wtsit tswit stwit wstit swtit tiswt itswt tsiwt stiwt istwt sitwt wistt iwstt wsitt switt iswtt siwtt twtsi wttsi ttwsi ttwsi wttsi twtsi twsti wtsti tswti stwti wstti swtti ttswi ttswi tstwi sttwi tstwi sttwi wtsti twsti wstti swtti tswti stwti titsw ittsw ttisw ttisw ittsw titsw tistw itstw tsitw stitw isttw sittw ttsiw ttsiw tstiw sttiw tstiw sttiw itstw tistw isttw sittw tsitw stitw witst iwtst wtist twist itwst tiwst wistt iwstt wsitt switt iswtt siwtt wtsit twsit wstit swtit tswit stwit itswt tiswt istwt sitwt tsiwt stiwt
Note: these 'words' (valid or invalid) are all the permutations of the word twits. These words are obtained by scrambling the letters in twits.