ureic rueic ueric euric reuic eruic uriec ruiec uirec iurec riuec iruec ueirc euirc uierc iuerc eiurc ieurc reiuc eriuc rieuc ireuc eiruc ieruc ureci rueci uerci eurci reuci eruci urcei rucei ucrei curei rcuei cruei uecri eucri uceri cueri ecuri ceuri recui ercui rceui creui ecrui cerui urice ruice uirce iurce riuce iruce urcie rucie ucrie curie rcuie cruie uicre iucre ucire cuire icure ciure ricue ircue rciue criue icrue cirue ueicr euicr uiecr iuecr eiucr ieucr uecir eucir uceir cueir ecuir ceuir uicer iucer ucier cuier icuer ciuer eicur iecur eciur ceiur iceur cieur reicu ericu riecu irecu eircu iercu reciu erciu rceiu creiu ecriu ceriu riceu irceu rcieu crieu icreu cireu eicru iecru eciru ceiru iceru cieru
Note: these 'words' (valid or invalid) are all the permutations of the word ureic. These words are obtained by scrambling the letters in ureic.