vails avils vials ivals aivls iavls valis avlis vlais lvais alvis lavis vilas ivlas vlias lvias ilvas livas ailvs ialvs alivs laivs ilavs liavs vaisl avisl viasl ivasl aivsl iavsl vasil avsil vsail svail asvil savil visal ivsal vsial svial isval sival aisvl iasvl asivl saivl isavl siavl valsi avlsi vlasi lvasi alvsi lavsi vasli avsli vsali svali asvli savli vlsai lvsai vslai svlai lsvai slvai alsvi lasvi aslvi salvi lsavi slavi vilsa ivlsa vlisa lvisa ilvsa livsa visla ivsla vsila svila isvla sivla vlsia lvsia vslia svlia lsvia slvia ilsva lisva islva silva lsiva sliva ailsv ialsv alisv laisv ilasv liasv aislv iaslv asilv sailv isalv sialv alsiv lasiv asliv saliv lsaiv slaiv ilsav lisav islav silav lsiav sliav
Note: these 'words' (valid or invalid) are all the permutations of the word vails. These words are obtained by scrambling the letters in vails.