vapid avpid vpaid pvaid apvid pavid vaipd avipd viapd ivapd aivpd iavpd vpiad pviad vipad ivpad pivad ipvad apivd paivd aipvd iapvd piavd ipavd vapdi avpdi vpadi pvadi apvdi pavdi vadpi avdpi vdapi dvapi advpi davpi vpdai pvdai vdpai dvpai pdvai dpvai apdvi padvi adpvi dapvi pdavi dpavi vaidp avidp viadp ivadp aivdp iavdp vadip avdip vdaip dvaip advip davip vidap ivdap vdiap dviap idvap divap aidvp iadvp adivp daivp idavp diavp vpida pvida vipda ivpda pivda ipvda vpdia pvdia vdpia dvpia pdvia dpvia vidpa ivdpa vdipa dvipa idvpa divpa pidva ipdva pdiva dpiva idpva dipva apidv paidv aipdv iapdv piadv ipadv apdiv padiv adpiv dapiv pdaiv dpaiv aidpv iadpv adipv daipv idapv diapv pidav ipdav pdiav dpiav idpav dipav
Note: these 'words' (valid or invalid) are all the permutations of the word vapid. These words are obtained by scrambling the letters in vapid.