study tsudy sutdy ustdy tusdy utsdy stduy tsduy sdtuy dstuy tdsuy dtsuy sudty usdty sduty dsuty udsty dusty tudsy utdsy tdusy dtusy udtsy dutsy stuyd tsuyd sutyd ustyd tusyd utsyd styud tsyud sytud ystud tysud ytsud suytd usytd syutd ysutd uystd yustd tuysd utysd tyusd ytusd uytsd yutsd stdyu tsdyu sdtyu dstyu tdsyu dtsyu stydu tsydu sytdu ystdu tysdu ytsdu sdytu dsytu sydtu ysdtu dystu ydstu tdysu dtysu tydsu ytdsu dytsu ydtsu sudyt usdyt sduyt dsuyt udsyt dusyt suydt usydt syudt ysudt uysdt yusdt sdyut dsyut sydut ysdut dysut ydsut udyst duyst uydst yudst dyust ydust tudys utdys tduys dtuys udtys dutys tuyds utyds tyuds ytuds uytds yutds tdyus dtyus tydus ytdus dytus ydtus udyts duyts uydts yudts dyuts yduts
Note: these 'words' (valid or invalid) are all the permutations of the word study. These words are obtained by scrambling the letters in study.