wfla fwla wlfa lwfa flwa lfwa wfal fwal wafl awfl fawl afwl wlaf lwaf walf awlf lawf alwf flaw lfaw falw aflw lafw alfw
Note: these 'words' (valid or invalid) are all the permutations of the word wfla. These words are obtained by scrambling the letters in wfla.