tells etlls tlels ltels eltls letls tells etlls tlels ltels eltls letls tlles ltles tlles ltles lltes lltes ellts lelts ellts lelts llets llets telsl etlsl tlesl ltesl eltsl letsl tesll etsll tsell stell estll setll tlsel ltsel tslel stlel lstel sltel elstl lestl esltl seltl lsetl sletl telsl etlsl tlesl ltesl eltsl letsl tesll etsll tsell stell estll setll tlsel ltsel tslel stlel lstel sltel elstl lestl esltl seltl lsetl sletl tllse ltlse tllse ltlse lltse lltse tlsle ltsle tslle stlle lstle sltle tlsle ltsle tslle stlle lstle sltle llste llste lslte sllte lslte sllte ellst lelst ellst lelst llest llest elslt leslt esllt sellt lselt slelt elslt leslt esllt sellt lselt slelt llset llset lslet sllet lslet sllet
Note: these 'words' (valid or invalid) are all the permutations of the word tells. These words are obtained by scrambling the letters in tells.