skjr ksjr sjkr jskr kjsr jksr skrj ksrj srkj rskj krsj rksj sjrk jsrk srjk rsjk jrsk rjsk kjrs jkrs krjs rkjs jrks rjks
Note: these 'words' (valid or invalid) are all the permutations of the word skjr. These words are obtained by scrambling the letters in skjr.