arfus rafus afrus farus rfaus fraus arufs raufs aurfs uarfs ruafs urafs afurs faurs aufrs uafrs fuars ufars rfuas fruas rufas urfas furas ufras arfsu rafsu afrsu farsu rfasu frasu arsfu rasfu asrfu sarfu rsafu srafu afsru fasru asfru safru fsaru sfaru rfsau frsau rsfau srfau fsrau sfrau arusf rausf aursf uarsf ruasf urasf arsuf rasuf asruf saruf rsauf srauf ausrf uasrf asurf saurf usarf suarf rusaf ursaf rsuaf sruaf usraf suraf afusr fausr aufsr uafsr fuasr ufasr afsur fasur asfur safur fsaur sfaur ausfr uasfr asufr saufr usafr suafr fusar ufsar fsuar sfuar usfar sufar rfusa frusa rufsa urfsa fursa ufrsa rfsua frsua rsfua srfua fsrua sfrua rusfa ursfa rsufa srufa usrfa surfa fusra ufsra fsura sfura usfra sufra
Note: these 'words' (valid or invalid) are all the permutations of the word arfus. These words are obtained by scrambling the letters in arfus.