flegs lfegs felgs eflgs lefgs elfgs flges lfges fgles gfles lgfes glfes fegls efgls fgels gfels egfls gefls legfs elgfs lgefs glefs eglfs gelfs flesg lfesg felsg eflsg lefsg elfsg flseg lfseg fsleg sfleg lsfeg slfeg feslg efslg fselg sfelg esflg seflg lesfg elsfg lsefg slefg eslfg selfg flgse lfgse fglse gflse lgfse glfse flsge lfsge fslge sflge lsfge slfge fgsle gfsle fsgle sfgle gsfle sgfle lgsfe glsfe lsgfe slgfe gslfe sglfe fegsl efgsl fgesl gfesl egfsl gefsl fesgl efsgl fsegl sfegl esfgl sefgl fgsel gfsel fsgel sfgel gsfel sgfel egsfl gesfl esgfl segfl gsefl sgefl legsf elgsf lgesf glesf eglsf gelsf lesgf elsgf lsegf slegf eslgf selgf lgsef glsef lsgef slgef gslef sglef egslf geslf esglf seglf gself sgelf
Note: these 'words' (valid or invalid) are all the permutations of the word flegs. These words are obtained by scrambling the letters in flegs.