ncrea cnrea nrcea rncea crnea rcnea ncera cnera necra encra cenra ecnra nreca rneca nerca enrca renca ernca crena rcena cerna ecrna recna ercna ncrae cnrae nrcae rncae crnae rcnae ncare cnare nacre ancre canre acnre nrace rnace narce anrce rance arnce crane rcane carne acrne racne arcne ncear cnear necar encar cenar ecnar ncaer cnaer nacer ancer caner acner neacr enacr naecr anecr eancr aencr ceanr ecanr caenr acenr eacnr aecnr nreac rneac nerac enrac renac ernac nraec rnaec narec anrec ranec arnec nearc enarc naerc anerc eanrc aenrc reanc eranc raenc arenc earnc aernc crean rcean ceran ecran recan ercan craen rcaen caren acren racen arcen cearn ecarn caern acern eacrn aecrn reacn eracn raecn arecn earcn aercn
Note: these 'words' (valid or invalid) are all the permutations of the word ncrea. These words are obtained by scrambling the letters in ncrea.