nercu enrcu nrecu rnecu erncu rencu necru encru nceru cneru ecnru cenru nrceu rnceu ncreu cnreu rcneu crneu ercnu recnu ecrnu cernu rcenu crenu neruc enruc nreuc rneuc ernuc renuc neurc enurc nuerc unerc eunrc uenrc nruec rnuec nurec unrec runec urnec erunc reunc eurnc uernc ruenc urenc necur encur nceur cneur ecnur cenur neucr enucr nuecr unecr euncr uencr ncuer cnuer nucer uncer cuner ucner ecunr ceunr eucnr uecnr cuenr ucenr nrcue rncue ncrue cnrue rcnue crnue nruce rnuce nurce unrce runce urnce ncure cnure nucre uncre cunre ucnre rcune crune rucne urcne curne ucrne ercun recun ecrun cerun rceun creun erucn reucn eurcn uercn ruecn urecn ecurn ceurn eucrn uecrn cuern ucern rcuen cruen rucen urcen curen ucren
Note: these 'words' (valid or invalid) are all the permutations of the word nercu. These words are obtained by scrambling the letters in nercu.