nycda yncda ncyda cnyda ycnda cynda nydca yndca ndyca dnyca ydnca dynca ncdya cndya ndcya dncya cdnya dcnya ycdna cydna ydcna dycna cdyna dcyna nycad yncad ncyad cnyad ycnad cynad nyacd ynacd naycd anycd yancd ayncd ncayd cnayd nacyd ancyd canyd acnyd ycand cyand yacnd aycnd caynd acynd nydac yndac ndyac dnyac ydnac dynac nyadc ynadc naydc anydc yandc ayndc ndayc dnayc nadyc andyc danyc adnyc ydanc dyanc yadnc aydnc daync adync ncday cnday ndcay dncay cdnay dcnay ncady cnady nacdy ancdy candy acndy ndacy dnacy nadcy andcy dancy adncy cdany dcany cadny acdny dacny adcny ycdan cydan ydcan dycan cdyan dcyan ycadn cyadn yacdn aycdn caydn acydn ydacn dyacn yadcn aydcn daycn adycn cdayn dcayn cadyn acdyn dacyn adcyn
Note: these 'words' (valid or invalid) are all the permutations of the word nycda. These words are obtained by scrambling the letters in nycda.