twals wtals tawls atwls watls awtls twlas wtlas tlwas ltwas wltas lwtas talws atlws tlaws ltaws altws latws walts awlts wlats lwats alwts lawts twasl wtasl tawsl atwsl watsl awtsl twsal wtsal tswal stwal wstal swtal taswl atswl tsawl stawl astwl satwl wastl awstl wsatl swatl aswtl sawtl twlsa wtlsa tlwsa ltwsa wltsa lwtsa twsla wtsla tswla stwla wstla swtla tlswa ltswa tslwa stlwa lstwa sltwa wlsta lwsta wslta swlta lswta slwta talsw atlsw tlasw ltasw altsw latsw taslw atslw tsalw stalw astlw satlw tlsaw ltsaw tslaw stlaw lstaw sltaw alstw lastw asltw saltw lsatw slatw walst awlst wlast lwast alwst lawst waslt awslt wsalt swalt aswlt sawlt wlsat lwsat wslat swlat lswat slwat alswt laswt aslwt salwt lsawt slawt
Note: these 'words' (valid or invalid) are all the permutations of the word twals. These words are obtained by scrambling the letters in twals.