straw tsraw srtaw rstaw trsaw rtsaw starw tsarw satrw astrw tasrw atsrw sratw rsatw sartw asrtw rastw arstw trasw rtasw tarsw atrsw ratsw artsw strwa tsrwa srtwa rstwa trswa rtswa stwra tswra swtra wstra twsra wtsra srwta rswta swrta wsrta rwsta wrsta trwsa rtwsa twrsa wtrsa rwtsa wrtsa stawr tsawr satwr astwr taswr atswr stwar tswar swtar wstar twsar wtsar sawtr aswtr swatr wsatr awstr wastr tawsr atwsr twasr wtasr awtsr watsr srawt rsawt sarwt asrwt raswt arswt srwat rswat swrat wsrat rwsat wrsat sawrt aswrt swart wsart awsrt wasrt rawst arwst rwast wrast awrst warst traws rtaws tarws atrws ratws artws trwas rtwas twras wtras rwtas wrtas tawrs atwrs twars wtars awtrs watrs rawts arwts rwats wrats awrts warts
Note: these 'words' (valid or invalid) are all the permutations of the word straw. These words are obtained by scrambling the letters in straw.