cills iclls clils lcils ilcls licls cills iclls clils lcils ilcls licls cllis lclis cllis lclis llcis llcis illcs lilcs illcs lilcs llics llics cilsl iclsl clisl lcisl ilcsl licsl cisll icsll csill scill iscll sicll clsil lcsil cslil sclil lscil slcil ilscl liscl islcl silcl lsicl slicl cilsl iclsl clisl lcisl ilcsl licsl cisll icsll csill scill iscll sicll clsil lcsil cslil sclil lscil slcil ilscl liscl islcl silcl lsicl slicl cllsi lclsi cllsi lclsi llcsi llcsi clsli lcsli cslli sclli lscli slcli clsli lcsli cslli sclli lscli slcli llsci llsci lslci sllci lslci sllci illsc lilsc illsc lilsc llisc llisc ilslc lislc isllc sillc lsilc slilc ilslc lislc isllc sillc lsilc slilc llsic llsic lslic sllic lslic sllic
Note: these 'words' (valid or invalid) are all the permutations of the word cills. These words are obtained by scrambling the letters in cills.