selfs eslfs slefs lsefs elsfs lesfs sefls esfls sfels fsels efsls fesls slfes lsfes sfles fsles lfses flses elfss lefss eflss felss lfess fless selsf eslsf slesf lsesf elssf lessf seslf esslf sself sself esslf seslf slsef lssef sslef sslef lssef slsef elssf lessf eslsf selsf lsesf slesf sefsl esfsl sfesl fsesl efssl fessl sesfl essfl ssefl ssefl essfl sesfl sfsel fssel ssfel ssfel fssel sfsel efssl fessl esfsl sefsl fsesl sfesl slfse lsfse sflse fslse lfsse flsse slsfe lssfe sslfe sslfe lssfe slsfe sfsle fssle ssfle ssfle fssle sfsle lfsse flsse lsfse slfse fslse sflse elfss lefss eflss felss lfess fless elsfs lesfs eslfs selfs lsefs slefs efsls fesls esfls sefls fsels sfels lfses flses lsfes slfes fsles sfles
Note: these 'words' (valid or invalid) are all the permutations of the word selfs. These words are obtained by scrambling the letters in selfs.