nisus insus nsius snius isnus sinus niuss inuss nuiss uniss iunss uinss nsuis snuis nusis unsis sunis usnis isuns siuns iusns uisns suins usins nissu inssu nsisu snisu isnsu sinsu nissu inssu nsisu snisu isnsu sinsu nssiu snsiu nssiu snsiu ssniu ssniu issnu sisnu issnu sisnu ssinu ssinu niuss inuss nuiss uniss iunss uinss nisus insus nsius snius isnus sinus nusis unsis nsuis snuis usnis sunis iusns uisns isuns siuns usins suins nsusi snusi nussi unssi sunsi usnsi nssui snsui nssui snsui ssnui ssnui nussi unssi nsusi snusi usnsi sunsi susni ussni ssuni ssuni ussni susni isusn siusn iussn uissn suisn usisn issun sisun issun sisun ssiun ssiun iussn uissn isusn siusn usisn suisn susin ussin ssuin ssuin ussin susin
Note: these 'words' (valid or invalid) are all the permutations of the word nisus. These words are obtained by scrambling the letters in nisus.