repus erpus rpeus preus eprus perus reups erups rueps ureps eurps uerps rpues prues rupes urpes pures upres epurs peurs euprs ueprs puers upers repsu erpsu rpesu presu eprsu persu respu erspu rsepu srepu esrpu serpu rpseu prseu rspeu srpeu psreu spreu epsru pesru espru sepru pseru speru reusp erusp ruesp uresp eursp uersp resup ersup rseup sreup esrup serup rusep ursep rsuep sruep usrep surep eusrp uesrp esurp seurp userp suerp rpuse pruse rupse urpse purse uprse rpsue prsue rspue srpue psrue sprue ruspe urspe rsupe srupe usrpe surpe pusre upsre psure spure uspre supre epusr peusr eupsr uepsr puesr upesr epsur pesur espur sepur pseur speur euspr uespr esupr seupr usepr suepr puser upser psuer spuer usper super
Note: these 'words' (valid or invalid) are all the permutations of the word repus. These words are obtained by scrambling the letters in repus.