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