walks awlks wlaks lwaks alwks lawks wakls awkls wkals kwals akwls kawls wlkas lwkas wklas kwlas lkwas klwas alkws lakws aklws kalws lkaws klaws walsk awlsk wlask lwask alwsk lawsk waslk awslk wsalk swalk aswlk sawlk wlsak lwsak wslak swlak lswak slwak alswk laswk aslwk salwk lsawk slawk waksl awksl wkasl kwasl akwsl kawsl waskl awskl wsakl swakl aswkl sawkl wksal kwsal wskal swkal kswal skwal akswl kaswl askwl sakwl ksawl skawl wlksa lwksa wklsa kwlsa lkwsa klwsa wlska lwska wslka swlka lswka slwka wksla kwsla wskla swkla kswla skwla lkswa klswa lskwa slkwa kslwa sklwa alksw laksw aklsw kalsw lkasw klasw alskw laskw aslkw salkw lsakw slakw akslw kaslw asklw saklw ksalw skalw lksaw klsaw lskaw slkaw kslaw sklaw
Note: these 'words' (valid or invalid) are all the permutations of the word walks. These words are obtained by scrambling the letters in walks.