yests eysts ysets syets esyts seyts yetss eytss ytess tyess etyss teyss ystes sytes ytses tyses styes tsyes estys setys etsys tesys steys tseys yesst eysst ysest syest esyst seyst yesst eysst ysest syest esyst seyst ysset syset ysset syset ssyet ssyet essyt sesyt essyt sesyt sseyt sseyt yetss eytss ytess tyess etyss teyss yests eysts ysets syets esyts seyts ytses tyses ystes sytes tsyes styes etsys tesys estys setys tseys steys ystse sytse ytsse tysse styse tsyse ysste syste ysste syste ssyte ssyte ytsse tysse ystse sytse tsyse styse stsye tssye sstye sstye tssye stsye estsy setsy etssy tessy stesy tsesy essty sesty essty sesty ssety ssety etssy tessy estsy setsy tsesy stesy stsey tssey sstey sstey tssey stsey
Note: these 'words' (valid or invalid) are all the permutations of the word yests. These words are obtained by scrambling the letters in yests.