courd ocurd cuord ucord oucrd uocrd corud ocrud croud rcoud orcud rocud curod ucrod cruod rcuod urcod rucod ourcd uorcd orucd roucd urocd ruocd coudr ocudr cuodr ucodr oucdr uocdr codur ocdur cdour dcour odcur docur cudor ucdor cduor dcuor udcor ducor oudcr uodcr oducr doucr udocr duocr cordu ocrdu crodu rcodu orcdu rocdu codru ocdru cdoru dcoru odcru docru crdou rcdou cdrou dcrou rdcou drcou ordcu rodcu odrcu dorcu rdocu drocu curdo ucrdo crudo rcudo urcdo rucdo cudro ucdro cduro dcuro udcro ducro crduo rcduo cdruo dcruo rdcuo drcuo urdco rudco udrco durco rduco druco ourdc uordc orudc roudc urodc ruodc oudrc uodrc odurc dourc udorc duorc orduc roduc odruc doruc rdouc drouc urdoc rudoc udroc duroc rduoc druoc
Note: these 'words' (valid or invalid) are all the permutations of the word courd. These words are obtained by scrambling the letters in courd.