pidtv ipdtv pditv dpitv idptv diptv pitdv iptdv ptidv tpidv itpdv tipdv pdtiv dptiv ptdiv tpdiv dtpiv tdpiv idtpv ditpv itdpv tidpv dtipv tdipv pidvt ipdvt pdivt dpivt idpvt dipvt pivdt ipvdt pvidt vpidt ivpdt vipdt pdvit dpvit pvdit vpdit dvpit vdpit idvpt divpt ivdpt vidpt dvipt vdipt pitvd iptvd ptivd tpivd itpvd tipvd pivtd ipvtd pvitd vpitd ivptd viptd ptvid tpvid pvtid vptid tvpid vtpid itvpd tivpd ivtpd vitpd tvipd vtipd pdtvi dptvi ptdvi tpdvi dtpvi tdpvi pdvti dpvti pvdti vpdti dvpti vdpti ptvdi tpvdi pvtdi vptdi tvpdi vtpdi dtvpi tdvpi dvtpi vdtpi tvdpi vtdpi idtvp ditvp itdvp tidvp dtivp tdivp idvtp divtp ivdtp vidtp dvitp vditp itvdp tivdp ivtdp vitdp tvidp vtidp dtvip tdvip dvtip vdtip tvdip vtdip
Note: these 'words' (valid or invalid) are all the permutations of the word pidtv. These words are obtained by scrambling the letters in pidtv.