yeesh eyesh yeesh eyesh eeysh eeysh yeseh eyseh yseeh syeeh esyeh seyeh yeseh eyseh yseeh syeeh esyeh seyeh eesyh eesyh eseyh seeyh eseyh seeyh yeehs eyehs yeehs eyehs eeyhs eeyhs yehes eyhes yhees hyees ehyes heyes yehes eyhes yhees hyees ehyes heyes eehys eehys eheys heeys eheys heeys yeshe eyshe ysehe syehe esyhe seyhe yehse eyhse yhese hyese ehyse heyse yshee syhee yhsee hysee shyee hsyee eshye sehye ehsye hesye sheye hseye yeshe eyshe ysehe syehe esyhe seyhe yehse eyhse yhese hyese ehyse heyse yshee syhee yhsee hysee shyee hsyee eshye sehye ehsye hesye sheye hseye eeshy eeshy esehy seehy esehy seehy eehsy eehsy ehesy heesy ehesy heesy eshey sehey ehsey hesey sheey hseey eshey sehey ehsey hesey sheey hseey
Note: these 'words' (valid or invalid) are all the permutations of the word yeesh. These words are obtained by scrambling the letters in yeesh.