pierts iperts peirts epirts ieprts eiprts pirets iprets priets rpiets irpets ripets perits eprits preits rpeits erpits repits ierpts eirpts irepts riepts eripts reipts pietrs ipetrs peitrs epitrs ieptrs eiptrs piters ipters ptiers tpiers itpers tipers petirs eptirs pteirs tpeirs etpirs tepirs ietprs eitprs iteprs tieprs etiprs teiprs pirtes iprtes prites rpites irptes riptes pitres iptres ptires tpires itpres tipres prties rpties ptries tpries rtpies trpies irtpes ritpes itrpes tirpes rtipes tripes pertis eprtis pretis rpetis erptis reptis petris eptris pteris tperis etpris tepris prteis rpteis ptreis tpreis rtpeis trpeis ertpis retpis etrpis terpis rtepis trepis iertps eirtps iretps rietps eritps reitps ietrps eitrps iterps tierps etirps teirps irteps riteps itreps tireps rtieps trieps ertips retips etrips terips rteips treips pierst iperst peirst epirst ieprst eiprst pirest iprest priest rpiest irpest ripest perist eprist preist rpeist erpist repist ierpst eirpst irepst riepst eripst reipst piesrt ipesrt peisrt episrt iepsrt eipsrt pisert ipsert psiert spiert ispert sipert pesirt epsirt pseirt speirt espirt sepirt iesprt eisprt iseprt sieprt esiprt seiprt pirset iprset priset rpiset irpset ripset pisret ipsret psiret spiret ispret sipret prsiet rpsiet psriet spriet rspiet srpiet irspet rispet isrpet sirpet rsipet sripet persit eprsit presit rpesit erpsit repsit pesrit epsrit pserit sperit esprit seprit prseit rpseit psreit spreit rspeit srpeit erspit respit esrpit serpit rsepit srepit ierspt eirspt irespt riespt erispt reispt iesrpt eisrpt iserpt sierpt esirpt seirpt irsept risept isrept sirept rsiept sriept ersipt resipt esript seript rseipt sreipt pietsr ipetsr peitsr epitsr ieptsr eiptsr pitesr iptesr ptiesr tpiesr itpesr tipesr petisr eptisr pteisr tpeisr etpisr tepisr ietpsr eitpsr itepsr tiepsr etipsr teipsr piestr ipestr peistr epistr iepstr eipstr pisetr ipsetr psietr spietr ispetr sipetr pesitr epsitr pseitr speitr espitr sepitr iesptr eisptr iseptr sieptr esiptr seiptr pitser iptser ptiser tpiser itpser tipser pister ipster psiter spiter ispter sipter ptsier tpsier pstier sptier tspier stpier itsper tisper istper sitper tsiper stiper petsir eptsir ptesir tpesir etpsir tepsir pestir epstir psetir spetir esptir septir ptseir tpseir psteir spteir tspeir stpeir etspir tespir estpir setpir tsepir stepir ietspr eitspr itespr tiespr etispr teispr iestpr eistpr isetpr sietpr esitpr seitpr itsepr tisepr istepr sitepr tsiepr stiepr etsipr tesipr estipr setipr tseipr steipr pirtse iprtse pritse rpitse irptse riptse pitrse iptrse ptirse tpirse itprse tiprse prtise rptise ptrise tprise rtpise trpise irtpse ritpse itrpse tirpse rtipse tripse pirste iprste priste rpiste irpste ripste pisrte ipsrte psirte spirte isprte siprte prsite rpsite psrite sprite rspite srpite irspte rispte isrpte sirpte rsipte sripte pitsre iptsre ptisre tpisre itpsre tipsre pistre ipstre psitre spitre isptre siptre ptsire tpsire pstire sptire tspire stpire itspre tispre istpre sitpre tsipre stipre prtsie rptsie ptrsie tprsie rtpsie trpsie prstie rpstie psrtie sprtie rsptie srptie ptsrie tpsrie pstrie sptrie tsprie stprie rtspie trspie rstpie srtpie tsrpie strpie irtspe ritspe itrspe tirspe rtispe trispe irstpe ristpe isrtpe sirtpe rsitpe sritpe itsrpe tisrpe istrpe sitrpe tsirpe stirpe rtsipe trsipe rstipe srtipe tsripe stripe pertsi eprtsi pretsi rpetsi erptsi reptsi petrsi eptrsi ptersi tpersi etprsi teprsi prtesi rptesi ptresi tpresi rtpesi trpesi ertpsi retpsi etrpsi terpsi rtepsi trepsi persti eprsti presti rpesti erpsti repsti pesrti epsrti pserti sperti esprti seprti prseti rpseti psreti spreti rspeti srpeti erspti respti esrpti serpti rsepti srepti petsri eptsri ptesri tpesri etpsri tepsri pestri epstri psetri spetri esptri septri ptseri tpseri psteri spteri tsperi stperi etspri tespri estpri setpri tsepri stepri prtsei rptsei ptrsei tprsei rtpsei trpsei prstei rpstei psrtei sprtei rsptei srptei ptsrei tpsrei pstrei sptrei tsprei stprei rtspei trspei rstpei srtpei tsrpei strpei ertspi retspi etrspi terspi rtespi trespi erstpi restpi esrtpi sertpi rsetpi sretpi etsrpi tesrpi estrpi setrpi tserpi sterpi rtsepi trsepi rstepi srtepi tsrepi strepi iertsp eirtsp iretsp rietsp eritsp reitsp ietrsp eitrsp itersp tiersp etirsp teirsp irtesp ritesp itresp tiresp rtiesp triesp ertisp retisp etrisp terisp rteisp treisp ierstp eirstp irestp riestp eristp reistp iesrtp eisrtp isertp siertp esirtp seirtp irsetp risetp isretp siretp rsietp srietp ersitp resitp esritp seritp rseitp sreitp ietsrp eitsrp itesrp tiesrp etisrp teisrp iestrp eistrp isetrp sietrp esitrp seitrp itserp tiserp isterp siterp tsierp stierp etsirp tesirp estirp setirp tseirp steirp irtsep ritsep itrsep tirsep rtisep trisep irstep ristep isrtep sirtep rsitep sritep itsrep tisrep istrep sitrep tsirep stirep rtsiep trsiep rstiep srtiep tsriep striep ertsip retsip etrsip tersip rtesip tresip erstip restip esrtip sertip rsetip sretip etsrip tesrip estrip setrip tserip sterip rtseip trseip rsteip srteip tsreip streip
Note: these 'words' (valid or invalid) are all the permutations of the word pierts. These words are obtained by scrambling the letters in pierts.