frass rfass farss afrss rafss arfss frsas rfsas fsras sfras rsfas srfas fasrs afsrs fsars sfars asfrs safrs rasfs arsfs rsafs srafs asrfs sarfs frass rfass farss afrss rafss arfss frsas rfsas fsras sfras rsfas srfas fasrs afsrs fsars sfars asfrs safrs rasfs arsfs rsafs srafs asrfs sarfs frssa rfssa fsrsa sfrsa rsfsa srfsa frssa rfssa fsrsa sfrsa rsfsa srfsa fssra sfsra fssra sfsra ssfra ssfra rssfa srsfa rssfa srsfa ssrfa ssrfa fassr afssr fsasr sfasr asfsr safsr fassr afssr fsasr sfasr asfsr safsr fssar sfsar fssar sfsar ssfar ssfar assfr sasfr assfr sasfr ssafr ssafr rassf arssf rsasf srasf asrsf sarsf rassf arssf rsasf srasf asrsf sarsf rssaf srsaf rssaf srsaf ssraf ssraf assrf sasrf assrf sasrf ssarf ssarf
Note: these 'words' (valid or invalid) are all the permutations of the word frass. These words are obtained by scrambling the letters in frass.