usher suher uhser huser shuer hsuer usehr suehr ueshr eushr seuhr esuhr uhesr huesr uehsr euhsr heusr ehusr sheur hseur sehur eshur hesur ehsur ushre suhre uhsre husre shure hsure usrhe surhe urshe rushe sruhe rsuhe uhrse hurse urhse ruhse hruse rhuse shrue hsrue srhue rshue hrsue rhsue userh suerh uesrh eusrh seurh esurh usreh sureh urseh ruseh srueh rsueh uersh eursh uresh ruesh erush reush seruh esruh sreuh rseuh ersuh resuh uhers huers uehrs euhrs heurs ehurs uhres hures urhes ruhes hrues rhues uerhs eurhs urehs ruehs eruhs reuhs herus ehrus hreus rheus erhus rehus sheru hseru sehru eshru hesru ehsru shreu hsreu srheu rsheu hrseu rhseu serhu esrhu srehu rsehu ershu reshu hersu ehrsu hresu rhesu erhsu rehsu
Note: these 'words' (valid or invalid) are all the permutations of the word usher. These words are obtained by scrambling the letters in usher.