fiver ifver fvier vfier ivfer vifer fievr ifevr feivr efivr iefvr eifvr fveir vfeir fevir efvir vefir evfir ivefr viefr ievfr eivfr veifr evifr fivre ifvre fvire vfire ivfre vifre firve ifrve frive rfive irfve rifve fvrie vfrie frvie rfvie vrfie rvfie ivrfe virfe irvfe rivfe vrife rvife fierv iferv feirv efirv iefrv eifrv firev ifrev friev rfiev irfev rifev feriv efriv freiv rfeiv erfiv refiv ierfv eirfv irefv riefv erifv reifv fveri vferi fevri efvri vefri evfri fvrei vfrei frvei rfvei vrfei rvfei fervi efrvi frevi rfevi erfvi refvi verfi evrfi vrefi rvefi ervfi revfi iverf vierf ievrf eivrf veirf evirf ivref viref irvef rivef vrief rvief iervf eirvf irevf rievf erivf reivf verif evrif vreif rveif ervif revif
Note: these 'words' (valid or invalid) are all the permutations of the word fiver. These words are obtained by scrambling the letters in fiver.