lirks ilrks lriks rliks irlks rilks likrs ilkrs lkirs klirs iklrs kilrs lrkis rlkis lkris klris rklis krlis irkls rikls ikrls kirls rkils krils lirsk ilrsk lrisk rlisk irlsk rilsk lisrk ilsrk lsirk slirk islrk silrk lrsik rlsik lsrik slrik rslik srlik irslk rislk isrlk sirlk rsilk srilk liksr ilksr lkisr klisr iklsr kilsr liskr ilskr lsikr slikr islkr silkr lksir klsir lskir slkir kslir sklir ikslr kislr isklr siklr ksilr skilr lrksi rlksi lkrsi klrsi rklsi krlsi lrski rlski lsrki slrki rslki srlki lksri klsri lskri slkri kslri sklri rksli krsli rskli srkli ksrli skrli irksl riksl ikrsl kirsl rkisl krisl irskl riskl isrkl sirkl rsikl srikl iksrl kisrl iskrl sikrl ksirl skirl rksil krsil rskil srkil ksril skril
Note: these 'words' (valid or invalid) are all the permutations of the word lirks. These words are obtained by scrambling the letters in lirks.