yukes uykes ykues kyues ukyes kuyes yueks uyeks yeuks eyuks ueyks euyks ykeus kyeus yekus eykus keyus ekyus ukeys kueys uekys eukys keuys ekuys yukse uykse ykuse kyuse ukyse kuyse yuske uyske ysuke syuke usyke suyke yksue kysue yskue sykue ksyue skyue uksye kusye uskye sukye ksuye skuye yuesk uyesk yeusk eyusk ueysk euysk yusek uysek ysuek syuek usyek suyek yesuk eysuk yseuk syeuk esyuk seyuk uesyk eusyk useyk sueyk esuyk seuyk ykesu kyesu yeksu eyksu keysu ekysu ykseu kyseu yskeu sykeu ksyeu skyeu yesku eysku yseku syeku esyku seyku kesyu eksyu kseyu skeyu eskyu sekyu ukesy kuesy ueksy euksy keusy ekusy uksey kusey uskey sukey ksuey skuey uesky eusky useky sueky esuky seuky kesuy eksuy kseuy skeuy eskuy sekuy
Note: these 'words' (valid or invalid) are all the permutations of the word yukes. These words are obtained by scrambling the letters in yukes.