piends ipends peinds epinds iepnds eipnds pineds ipneds pnieds npieds inpeds nipeds penids epnids pneids npeids enpids nepids ienpds einpds inepds niepds enipds neipds piedns ipedns peidns epidns iepdns eipdns pidens ipdens pdiens dpiens idpens dipens pedins epdins pdeins dpeins edpins depins iedpns eidpns idepns diepns edipns deipns pindes ipndes pnides npides inpdes nipdes pidnes ipdnes pdines dpines idpnes dipnes pndies npdies pdnies dpnies ndpies dnpies indpes nidpes idnpes dinpes ndipes dnipes pendis epndis pnedis npedis enpdis nepdis pednis epdnis pdenis dpenis edpnis depnis pndeis npdeis pdneis dpneis ndpeis dnpeis endpis nedpis ednpis denpis ndepis dnepis iendps eindps inedps niedps enidps neidps iednps eidnps idenps dienps edinps deinps indeps nideps idneps dineps ndieps dnieps endips nedips ednips denips ndeips dneips piensd ipensd peinsd epinsd iepnsd eipnsd pinesd ipnesd pniesd npiesd inpesd nipesd penisd epnisd pneisd npeisd enpisd nepisd ienpsd einpsd inepsd niepsd enipsd neipsd piesnd ipesnd peisnd episnd iepsnd eipsnd pisend ipsend psiend spiend ispend sipend pesind epsind pseind speind espind sepind iespnd eispnd isepnd siepnd esipnd seipnd pinsed ipnsed pnised npised inpsed nipsed pisned ipsned psined spined ispned sipned pnsied npsied psnied spnied nspied snpied insped nisped isnped sinped nsiped sniped pensid epnsid pnesid npesid enpsid nepsid pesnid epsnid psenid spenid espnid sepnid pnseid npseid psneid spneid nspeid snpeid enspid nespid esnpid senpid nsepid snepid ienspd einspd inespd niespd enispd neispd iesnpd eisnpd isenpd sienpd esinpd seinpd insepd nisepd isnepd sinepd nsiepd sniepd ensipd nesipd esnipd senipd nseipd sneipd piedsn ipedsn peidsn epidsn iepdsn eipdsn pidesn ipdesn pdiesn dpiesn idpesn dipesn pedisn epdisn pdeisn dpeisn edpisn depisn iedpsn eidpsn idepsn diepsn edipsn deipsn piesdn ipesdn peisdn episdn iepsdn eipsdn pisedn ipsedn psiedn spiedn ispedn sipedn pesidn epsidn pseidn speidn espidn sepidn iespdn eispdn isepdn siepdn esipdn seipdn pidsen ipdsen pdisen dpisen idpsen dipsen pisden ipsden psiden spiden ispden sipden pdsien dpsien psdien spdien dspien sdpien idspen dispen isdpen sidpen dsipen sdipen pedsin epdsin pdesin dpesin edpsin depsin pesdin epsdin psedin spedin espdin sepdin pdsein dpsein psdein spdein dspein sdpein edspin despin esdpin sedpin dsepin sdepin iedspn eidspn idespn diespn edispn deispn iesdpn eisdpn isedpn siedpn esidpn seidpn idsepn disepn isdepn sidepn dsiepn sdiepn edsipn desipn esdipn sedipn dseipn sdeipn pindse ipndse pnidse npidse inpdse nipdse pidnse ipdnse pdinse dpinse idpnse dipnse pndise npdise pdnise dpnise ndpise dnpise indpse nidpse idnpse dinpse ndipse dnipse pinsde ipnsde pnisde npisde inpsde nipsde pisnde ipsnde psinde spinde ispnde sipnde pnside npside psnide spnide nspide snpide inspde nispde isnpde sinpde nsipde snipde pidsne ipdsne pdisne dpisne idpsne dipsne pisdne ipsdne psidne spidne ispdne sipdne pdsine dpsine psdine spdine dspine sdpine idspne dispne isdpne sidpne dsipne sdipne pndsie npdsie pdnsie dpnsie ndpsie dnpsie pnsdie npsdie psndie spndie nspdie snpdie pdsnie dpsnie psdnie spdnie dspnie sdpnie ndspie dnspie nsdpie sndpie dsnpie sdnpie indspe nidspe idnspe dinspe ndispe dnispe insdpe nisdpe isndpe sindpe nsidpe snidpe idsnpe disnpe isdnpe sidnpe dsinpe sdinpe ndsipe dnsipe nsdipe sndipe dsnipe sdnipe pendsi epndsi pnedsi npedsi enpdsi nepdsi pednsi epdnsi pdensi dpensi edpnsi depnsi pndesi npdesi pdnesi dpnesi ndpesi dnpesi endpsi nedpsi ednpsi denpsi ndepsi dnepsi pensdi epnsdi pnesdi npesdi enpsdi nepsdi pesndi epsndi psendi spendi espndi sepndi pnsedi npsedi psnedi spnedi nspedi snpedi enspdi nespdi esnpdi senpdi nsepdi snepdi pedsni epdsni pdesni dpesni edpsni depsni pesdni epsdni psedni spedni espdni sepdni pdseni dpseni psdeni spdeni dspeni sdpeni edspni despni esdpni sedpni dsepni sdepni pndsei npdsei pdnsei dpnsei ndpsei dnpsei pnsdei npsdei psndei spndei nspdei snpdei pdsnei dpsnei psdnei spdnei dspnei sdpnei ndspei dnspei nsdpei sndpei dsnpei sdnpei endspi nedspi ednspi denspi ndespi dnespi ensdpi nesdpi esndpi sendpi nsedpi snedpi edsnpi desnpi esdnpi sednpi dsenpi sdenpi ndsepi dnsepi nsdepi sndepi dsnepi sdnepi iendsp eindsp inedsp niedsp enidsp neidsp iednsp eidnsp idensp diensp edinsp deinsp indesp nidesp idnesp dinesp ndiesp dniesp endisp nedisp ednisp denisp ndeisp dneisp iensdp einsdp inesdp niesdp enisdp neisdp iesndp eisndp isendp siendp esindp seindp insedp nisedp isnedp sinedp nsiedp sniedp ensidp nesidp esnidp senidp nseidp sneidp iedsnp eidsnp idesnp diesnp edisnp deisnp iesdnp eisdnp isednp siednp esidnp seidnp idsenp disenp isdenp sidenp dsienp sdienp edsinp desinp esdinp sedinp dseinp sdeinp indsep nidsep idnsep dinsep ndisep dnisep insdep nisdep isndep sindep nsidep snidep idsnep disnep isdnep sidnep dsinep sdinep ndsiep dnsiep nsdiep sndiep dsniep sdniep endsip nedsip ednsip densip ndesip dnesip ensdip nesdip esndip sendip nsedip snedip edsnip desnip esdnip sednip dsenip sdenip ndseip dnseip nsdeip sndeip dsneip sdneip
Note: these 'words' (valid or invalid) are all the permutations of the word piends. These words are obtained by scrambling the letters in piends.