wacks awcks wcaks cwaks acwks cawks wakcs awkcs wkacs kwacs akwcs kawcs wckas cwkas wkcas kwcas ckwas kcwas ackws cakws akcws kacws ckaws kcaws wacsk awcsk wcask cwask acwsk cawsk wasck awsck wsack swack aswck sawck wcsak cwsak wscak swcak cswak scwak acswk caswk ascwk sacwk csawk scawk waksc awksc wkasc kwasc akwsc kawsc waskc awskc wsakc swakc aswkc sawkc wksac kwsac wskac swkac kswac skwac akswc kaswc askwc sakwc ksawc skawc wcksa cwksa wkcsa kwcsa ckwsa kcwsa wcska cwska wscka swcka cswka scwka wksca kwsca wskca swkca kswca skwca ckswa kcswa cskwa sckwa kscwa skcwa acksw caksw akcsw kacsw ckasw kcasw acskw caskw asckw sackw csakw scakw akscw kascw askcw sakcw ksacw skacw cksaw kcsaw cskaw sckaw kscaw skcaw
Note: these 'words' (valid or invalid) are all the permutations of the word wacks. These words are obtained by scrambling the letters in wacks.