thilk htilk tihlk ithlk hitlk ihtlk thlik htlik tlhik lthik hltik lhtik tilhk itlhk tlihk ltihk ilthk lithk hiltk ihltk hlitk lhitk ilhtk lihtk thikl htikl tihkl ithkl hitkl ihtkl thkil htkil tkhil kthil hktil khtil tikhl itkhl tkihl ktihl ikthl kithl hiktl ihktl hkitl khitl ikhtl kihtl thlki htlki tlhki lthki hltki lhtki thkli htkli tkhli kthli hktli khtli tlkhi ltkhi tklhi ktlhi lkthi klthi hlkti lhkti hklti khlti lkhti klhti tilkh itlkh tlikh ltikh iltkh litkh tiklh itklh tkilh ktilh iktlh kitlh tlkih ltkih tklih ktlih lktih kltih ilkth likth iklth kilth lkith klith hilkt ihlkt hlikt lhikt ilhkt lihkt hiklt ihklt hkilt khilt ikhlt kihlt hlkit lhkit hklit khlit lkhit klhit ilkht likht iklht kilht lkiht kliht
Note: these 'words' (valid or invalid) are all the permutations of the word thilk. These words are obtained by scrambling the letters in thilk.