luffs ulffs lfufs flufs uflfs fulfs luffs ulffs lfufs flufs uflfs fulfs lffus flfus lffus flfus fflus fflus uffls fufls uffls fufls ffuls ffuls lufsf ulfsf lfusf flusf uflsf fulsf lusff ulsff lsuff sluff uslff sulff lfsuf flsuf lsfuf slfuf fsluf sfluf ufslf fuslf usflf suflf fsulf sfulf lufsf ulfsf lfusf flusf uflsf fulsf lusff ulsff lsuff sluff uslff sulff lfsuf flsuf lsfuf slfuf fsluf sfluf ufslf fuslf usflf suflf fsulf sfulf lffsu flfsu lffsu flfsu fflsu fflsu lfsfu flsfu lsffu slffu fslfu sflfu lfsfu flsfu lsffu slffu fslfu sflfu ffslu ffslu fsflu sfflu fsflu sfflu uffsl fufsl uffsl fufsl ffusl ffusl ufsfl fusfl usffl suffl fsufl sfufl ufsfl fusfl usffl suffl fsufl sfufl ffsul ffsul fsful sfful fsful sfful
Note: these 'words' (valid or invalid) are all the permutations of the word luffs. These words are obtained by scrambling the letters in luffs.