ratus artus rtaus traus atrus tarus rauts aruts ruats urats aurts uarts rtuas truas rutas urtas turas utras aturs taurs autrs uatrs tuars utars ratsu artsu rtasu trasu atrsu tarsu rastu arstu rsatu sratu asrtu sartu rtsau trsau rstau srtau tsrau strau atsru tasru astru satru tsaru staru raust arust ruast urast aurst uarst rasut arsut rsaut sraut asrut sarut rusat ursat rsuat sruat usrat surat ausrt uasrt asurt saurt usart suart rtusa trusa rutsa urtsa tursa utrsa rtsua trsua rstua srtua tsrua strua rusta ursta rsuta sruta usrta surta tusra utsra tsura stura ustra sutra atusr tausr autsr uatsr tuasr utasr atsur tasur astur satur tsaur staur austr uastr asutr sautr usatr suatr tusar utsar tsuar stuar ustar sutar
Note: these 'words' (valid or invalid) are all the permutations of the word ratus. These words are obtained by scrambling the letters in ratus.