riptd irptd rpitd pritd iprtd pirtd ritpd irtpd rtipd tripd itrpd tirpd rptid prtid rtpid trpid ptrid tprid iptrd pitrd itprd tiprd ptird tpird ripdt irpdt rpidt pridt iprdt pirdt ridpt irdpt rdipt dript idrpt dirpt rpdit prdit rdpit drpit pdrit dprit ipdrt pidrt idprt diprt pdirt dpirt ritdp irtdp rtidp tridp itrdp tirdp ridtp irdtp rditp dritp idrtp dirtp rtdip trdip rdtip drtip tdrip dtrip itdrp tidrp idtrp ditrp tdirp dtirp rptdi prtdi rtpdi trpdi ptrdi tprdi rpdti prdti rdpti drpti pdrti dprti rtdpi trdpi rdtpi drtpi tdrpi dtrpi ptdri tpdri pdtri dptri tdpri dtpri iptdr pitdr itpdr tipdr ptidr tpidr ipdtr pidtr idptr diptr pditr dpitr itdpr tidpr idtpr ditpr tdipr dtipr ptdir tpdir pdtir dptir tdpir dtpir
Note: these 'words' (valid or invalid) are all the permutations of the word riptd. These words are obtained by scrambling the letters in riptd.