ceili ecili cieli iceli eicli iecli celii eclii cleii lceii elcii lecii cilei iclei cliei lciei ilcei licei eilci ielci elici leici ileci lieci ceiil eciil cieil iceil eicil iecil ceiil eciil cieil iceil eicil iecil ciiel iciel ciiel iciel iicel iicel eiicl ieicl eiicl ieicl iiecl iiecl celii eclii cleii lceii elcii lecii ceili ecili cieli iceli eicli iecli cliei lciei cilei iclei licei ilcei elici leici eilci ielci lieci ileci cilie iclie cliie lciie ilcie licie ciile icile ciile icile iicle iicle cliie lciie cilie iclie licie ilcie ilice liice iilce iilce liice ilice eilic ielic eliic leiic ileic lieic eiilc ieilc eiilc ieilc iielc iielc eliic leiic eilic ielic lieic ileic iliec liiec iilec iilec liiec iliec
Note: these 'words' (valid or invalid) are all the permutations of the word ceili. These words are obtained by scrambling the letters in ceili.