lines ilnes lnies nlies inles niles liens ilens leins elins ielns eilns lneis nleis lenis elnis nelis enlis inels niels ienls einls neils enils linse ilnse lnise nlise inlse nilse lisne ilsne lsine sline islne silne lnsie nlsie lsnie slnie nslie snlie insle nisle isnle sinle nsile snile liesn ilesn leisn elisn ielsn eilsn lisen ilsen lsien slien islen silen lesin elsin lsein slein eslin selin iesln eisln iseln sieln esiln seiln lnesi nlesi lensi elnsi nelsi enlsi lnsei nlsei lsnei slnei nslei snlei lesni elsni lseni sleni eslni selni nesli ensli nseli sneli esnli senli inesl niesl iensl einsl neisl enisl insel nisel isnel sinel nsiel sniel iesnl eisnl isenl sienl esinl seinl nesil ensil nseil sneil esnil senil
Note: these 'words' (valid or invalid) are all the permutations of the word lines. These words are obtained by scrambling the letters in lines.