heptad ehptad hpetad phetad ephtad pehtad hetpad ehtpad htepad thepad ethpad tehpad hptead phtead htpead thpead pthead tphead epthad pethad etphad tephad ptehad tpehad hepatd ehpatd hpeatd pheatd ephatd pehatd heaptd ehaptd haeptd aheptd eahptd aehptd hpaetd phaetd hapetd ahpetd pahetd aphetd epahtd peahtd eaphtd aephtd paehtd apehtd hetapd ehtapd hteapd theapd ethapd tehapd heatpd ehatpd haetpd ahetpd eahtpd aehtpd htaepd thaepd hatepd ahtepd tahepd athepd etahpd teahpd eathpd aethpd taehpd atehpd hptaed phtaed htpaed thpaed pthaed tphaed hpated phated hapted ahpted pahted aphted htaped thaped hatped ahtped tahped athped ptahed tpahed pathed apthed taphed atphed eptahd petahd etpahd tepahd pteahd tpeahd epathd peathd eapthd aepthd paethd apethd etaphd teaphd eatphd aetphd taephd atephd ptaehd tpaehd patehd aptehd tapehd atpehd heptda ehptda hpetda phetda ephtda pehtda hetpda ehtpda htepda thepda ethpda tehpda hpteda phteda htpeda thpeda ptheda tpheda epthda pethda etphda tephda ptehda tpehda hepdta ehpdta hpedta phedta ephdta pehdta hedpta ehdpta hdepta dhepta edhpta dehpta hpdeta phdeta hdpeta dhpeta pdheta dpheta epdhta pedhta edphta dephta pdehta dpehta hetdpa ehtdpa htedpa thedpa ethdpa tehdpa hedtpa ehdtpa hdetpa dhetpa edhtpa dehtpa htdepa thdepa hdtepa dhtepa tdhepa dthepa etdhpa tedhpa edthpa dethpa tdehpa dtehpa hptdea phtdea htpdea thpdea pthdea tphdea hpdtea phdtea hdptea dhptea pdhtea dphtea htdpea thdpea hdtpea dhtpea tdhpea dthpea ptdhea tpdhea pdthea dpthea tdphea dtphea eptdha petdha etpdha tepdha ptedha tpedha epdtha pedtha edptha deptha pdetha dpetha etdpha tedpha edtpha detpha tdepha dtepha ptdeha tpdeha pdteha dpteha tdpeha dtpeha hepadt ehpadt hpeadt pheadt ephadt pehadt heapdt ehapdt haepdt ahepdt eahpdt aehpdt hpaedt phaedt hapedt ahpedt pahedt aphedt epahdt peahdt eaphdt aephdt paehdt apehdt hepdat ehpdat hpedat phedat ephdat pehdat hedpat ehdpat hdepat dhepat edhpat dehpat hpdeat phdeat hdpeat dhpeat pdheat dpheat epdhat pedhat edphat dephat pdehat dpehat headpt ehadpt haedpt ahedpt eahdpt aehdpt hedapt ehdapt hdeapt dheapt edhapt dehapt hadept ahdept hdaept dhaept adhept dahept eadhpt aedhpt edahpt deahpt adehpt daehpt hpadet phadet hapdet ahpdet pahdet aphdet hpdaet phdaet hdpaet dhpaet pdhaet dphaet hadpet ahdpet hdapet dhapet adhpet dahpet padhet apdhet pdahet dpahet adphet daphet epadht peadht eapdht aepdht paedht apedht epdaht pedaht edpaht depaht pdeaht dpeaht eadpht aedpht edapht deapht adepht daepht padeht apdeht pdaeht dpaeht adpeht dapeht hetadp ehtadp hteadp theadp ethadp tehadp heatdp ehatdp haetdp ahetdp eahtdp aehtdp htaedp thaedp hatedp ahtedp tahedp athedp etahdp teahdp eathdp aethdp taehdp atehdp hetdap ehtdap htedap thedap ethdap tehdap hedtap ehdtap hdetap dhetap edhtap dehtap htdeap thdeap hdteap dhteap tdheap dtheap etdhap tedhap edthap dethap tdehap dtehap headtp ehadtp haedtp ahedtp eahdtp aehdtp hedatp ehdatp hdeatp dheatp edhatp dehatp hadetp ahdetp hdaetp dhaetp adhetp dahetp eadhtp aedhtp edahtp deahtp adehtp daehtp htadep thadep hatdep ahtdep tahdep athdep htdaep thdaep hdtaep dhtaep tdhaep dthaep hadtep ahdtep hdatep dhatep adhtep dahtep tadhep atdhep tdahep dtahep adthep dathep etadhp teadhp eatdhp aetdhp taedhp atedhp etdahp tedahp edtahp detahp tdeahp dteahp eadthp aedthp edathp deathp adethp daethp tadehp atdehp tdaehp dtaehp adtehp datehp hptade phtade htpade thpade pthade tphade hpatde phatde haptde ahptde pahtde aphtde htapde thapde hatpde ahtpde tahpde athpde ptahde tpahde pathde apthde taphde atphde hptdae phtdae htpdae thpdae pthdae tphdae hpdtae phdtae hdptae dhptae pdhtae dphtae htdpae thdpae hdtpae dhtpae tdhpae dthpae ptdhae tpdhae pdthae dpthae tdphae dtphae hpadte phadte hapdte ahpdte pahdte aphdte hpdate phdate hdpate dhpate pdhate dphate hadpte ahdpte hdapte dhapte adhpte dahpte padhte apdhte pdahte dpahte adphte daphte htadpe thadpe hatdpe ahtdpe tahdpe athdpe htdape thdape hdtape dhtape tdhape dthape hadtpe ahdtpe hdatpe dhatpe adhtpe dahtpe tadhpe atdhpe tdahpe dtahpe adthpe dathpe ptadhe tpadhe patdhe aptdhe tapdhe atpdhe ptdahe tpdahe pdtahe dptahe tdpahe dtpahe padthe apdthe pdathe dpathe adpthe dapthe tadphe atdphe tdaphe dtaphe adtphe datphe eptadh petadh etpadh tepadh pteadh tpeadh epatdh peatdh eaptdh aeptdh paetdh apetdh etapdh teapdh eatpdh aetpdh taepdh atepdh ptaedh tpaedh patedh aptedh tapedh atpedh eptdah petdah etpdah tepdah ptedah tpedah epdtah pedtah edptah deptah pdetah dpetah etdpah tedpah edtpah detpah tdepah dtepah ptdeah tpdeah pdteah dpteah tdpeah dtpeah epadth peadth eapdth aepdth paedth apedth epdath pedath edpath depath pdeath dpeath eadpth aedpth edapth deapth adepth daepth padeth apdeth pdaeth dpaeth adpeth dapeth etadph teadph eatdph aetdph taedph atedph etdaph tedaph edtaph detaph tdeaph dteaph eadtph aedtph edatph deatph adetph daetph tadeph atdeph tdaeph dtaeph adteph dateph ptadeh tpadeh patdeh aptdeh tapdeh atpdeh ptdaeh tpdaeh pdtaeh dptaeh tdpaeh dtpaeh padteh apdteh pdateh dpateh adpteh dapteh tadpeh atdpeh tdapeh dtapeh adtpeh datpeh
Note: these 'words' (valid or invalid) are all the permutations of the word heptad. These words are obtained by scrambling the letters in heptad.