yatts aytts ytats tyats atyts tayts yatts aytts ytats tyats atyts tayts yttas tytas yttas tytas ttyas ttyas attys tatys attys tatys ttays ttays yatst aytst ytast tyast atyst tayst yastt aystt ysatt syatt asytt saytt ytsat tysat ystat sytat tsyat styat atsyt tasyt astyt satyt tsayt stayt yatst aytst ytast tyast atyst tayst yastt aystt ysatt syatt asytt saytt ytsat tysat ystat sytat tsyat styat atsyt tasyt astyt satyt tsayt stayt yttsa tytsa yttsa tytsa ttysa ttysa ytsta tysta ystta sytta tsyta styta ytsta tysta ystta sytta tsyta styta ttsya ttsya tstya sttya tstya sttya attsy tatsy attsy tatsy ttasy ttasy atsty tasty astty satty tsaty staty atsty tasty astty satty tsaty staty ttsay ttsay tstay sttay tstay sttay
Note: these 'words' (valid or invalid) are all the permutations of the word yatts. These words are obtained by scrambling the letters in yatts.