rakus arkus rkaus kraus akrus karus rauks aruks ruaks uraks aurks uarks rkuas kruas rukas urkas kuras ukras akurs kaurs aukrs uakrs kuars ukars raksu arksu rkasu krasu akrsu karsu rasku arsku rsaku sraku asrku sarku rksau krsau rskau srkau ksrau skrau aksru kasru askru sakru ksaru skaru rausk arusk ruask urask aursk uarsk rasuk arsuk rsauk srauk asruk saruk rusak ursak rsuak sruak usrak surak ausrk uasrk asurk saurk usark suark rkusa krusa ruksa urksa kursa ukrsa rksua krsua rskua srkua ksrua skrua ruska urska rsuka sruka usrka surka kusra uksra ksura skura uskra sukra akusr kausr auksr uaksr kuasr ukasr aksur kasur askur sakur ksaur skaur auskr uaskr asukr saukr usakr suakr kusar uksar ksuar skuar uskar sukar
Note: these 'words' (valid or invalid) are all the permutations of the word rakus. These words are obtained by scrambling the letters in rakus.