soutw osutw suotw usotw oustw uostw sotuw ostuw stouw tsouw otsuw tosuw sutow ustow stuow tsuow utsow tusow outsw uotsw otusw tousw utosw tuosw souwt osuwt suowt usowt ouswt uoswt sowut oswut swout wsout owsut wosut suwot uswot swuot wsuot uwsot wusot ouwst uowst owust woust uwost wuost sotwu ostwu stowu tsowu otswu toswu sowtu oswtu swotu wsotu owstu wostu stwou tswou swtou wstou twsou wtsou otwsu towsu owtsu wotsu twosu wtosu sutwo ustwo stuwo tsuwo utswo tuswo suwto uswto swuto wsuto uwsto wusto stwuo tswuo swtuo wstuo twsuo wtsuo utwso tuwso uwtso wutso twuso wtuso outws uotws otuws touws utows tuows ouwts uowts owuts wouts uwots wuots otwus towus owtus wotus twous wtous utwos tuwos uwtos wutos twuos wtuos
Note: these 'words' (valid or invalid) are all the permutations of the word soutw. These words are obtained by scrambling the letters in soutw.