aredf raedf aerdf eardf readf eradf ardef radef adref daref rdaef draef aedrf eadrf aderf daerf edarf dearf redaf erdaf rdeaf dreaf edraf deraf arefd raefd aerfd earfd reafd erafd arfed rafed afred fared rfaed fraed aefrd eafrd aferd faerd efard feard refad erfad rfead fread efrad ferad ardfe radfe adrfe darfe rdafe drafe arfde rafde afrde farde rfade frade adfre dafre afdre fadre dfare fdare rdfae drfae rfdae frdae dfrae fdrae aedfr eadfr adefr daefr edafr deafr aefdr eafdr afedr faedr efadr feadr adfer dafer afder fader dfaer fdaer edfar defar efdar fedar dfear fdear redfa erdfa rdefa drefa edrfa derfa refda erfda rfeda freda efrda ferda rdfea drfea rfdea frdea dfrea fdrea edfra defra efdra fedra dfera fdera
Note: these 'words' (valid or invalid) are all the permutations of the word aredf. These words are obtained by scrambling the letters in aredf.