spilth psilth siplth isplth pislth ipslth splith pslith slpith lspith plsith lpsith silpth islpth slipth lsipth ilspth lispth pilsth iplsth plisth lpisth ilpsth lipsth spitlh psitlh siptlh isptlh pistlh ipstlh sptilh pstilh stpilh tspilh ptsilh tpsilh sitplh istplh stiplh tsiplh itsplh tisplh pitslh iptslh ptislh tpislh itpslh tipslh spltih psltih slptih lsptih plstih lpstih sptlih pstlih stplih tsplih ptslih tpslih sltpih lstpih stlpih tslpih ltspih tlspih pltsih lptsih ptlsih tplsih ltpsih tlpsih siltph isltph slitph lsitph ilstph listph sitlph istlph stilph tsilph itslph tislph sltiph lstiph stliph tsliph ltsiph tlsiph iltsph litsph itlsph tilsph ltisph tlisph piltsh ipltsh plitsh lpitsh ilptsh liptsh pitlsh iptlsh ptilsh tpilsh itplsh tiplsh pltish lptish ptlish tplish ltpish tlpish iltpsh litpsh itlpsh tilpsh ltipsh tlipsh spilht psilht siplht isplht pislht ipslht spliht psliht slpiht lspiht plsiht lpsiht silpht islpht slipht lsipht ilspht lispht pilsht iplsht plisht lpisht ilpsht lipsht spihlt psihlt siphlt isphlt pishlt ipshlt sphilt pshilt shpilt hspilt phsilt hpsilt sihplt ishplt shiplt hsiplt ihsplt hisplt pihslt iphslt phislt hpislt ihpslt hipslt splhit pslhit slphit lsphit plshit lpshit sphlit pshlit shplit hsplit phslit hpslit slhpit lshpit shlpit hslpit lhspit hlspit plhsit lphsit phlsit hplsit lhpsit hlpsit silhpt islhpt slihpt lsihpt ilshpt lishpt sihlpt ishlpt shilpt hsilpt ihslpt hislpt slhipt lshipt shlipt hslipt lhsipt hlsipt ilhspt lihspt ihlspt hilspt lhispt hlispt pilhst iplhst plihst lpihst ilphst liphst pihlst iphlst philst hpilst ihplst hiplst plhist lphist phlist hplist lhpist hlpist ilhpst lihpst ihlpst hilpst lhipst hlipst spithl psithl sipthl ispthl pisthl ipsthl sptihl pstihl stpihl tspihl ptsihl tpsihl sitphl istphl stiphl tsiphl itsphl tisphl pitshl iptshl ptishl tpishl itpshl tipshl spihtl psihtl siphtl isphtl pishtl ipshtl sphitl pshitl shpitl hspitl phsitl hpsitl sihptl ishptl shiptl hsiptl ihsptl hisptl pihstl iphstl phistl hpistl ihpstl hipstl spthil psthil stphil tsphil ptshil tpshil sphtil pshtil shptil hsptil phstil hpstil sthpil tshpil shtpil hstpil thspil htspil pthsil tphsil phtsil hptsil thpsil htpsil sithpl isthpl stihpl tsihpl itshpl tishpl sihtpl ishtpl shitpl hsitpl ihstpl histpl sthipl tshipl shtipl hstipl thsipl htsipl ithspl tihspl ihtspl hitspl thispl htispl pithsl ipthsl ptihsl tpihsl itphsl tiphsl pihtsl iphtsl phitsl hpitsl ihptsl hiptsl pthisl tphisl phtisl hptisl thpisl htpisl ithpsl tihpsl ihtpsl hitpsl thipsl htipsl splthi pslthi slpthi lspthi plsthi lpsthi sptlhi pstlhi stplhi tsplhi ptslhi tpslhi sltphi lstphi stlphi tslphi ltsphi tlsphi pltshi lptshi ptlshi tplshi ltpshi tlpshi splhti pslhti slphti lsphti plshti lpshti sphlti pshlti shplti hsplti phslti hpslti slhpti lshpti shlpti hslpti lhspti hlspti plhsti lphsti phlsti hplsti lhpsti hlpsti spthli psthli stphli tsphli ptshli tpshli sphtli pshtli shptli hsptli phstli hpstli sthpli tshpli shtpli hstpli thspli htspli pthsli tphsli phtsli hptsli thpsli htpsli slthpi lsthpi stlhpi tslhpi ltshpi tlshpi slhtpi lshtpi shltpi hsltpi lhstpi hlstpi sthlpi tshlpi shtlpi hstlpi thslpi htslpi lthspi tlhspi lhtspi hltspi thlspi htlspi plthsi lpthsi ptlhsi tplhsi ltphsi tlphsi plhtsi lphtsi phltsi hpltsi lhptsi hlptsi pthlsi tphlsi phtlsi hptlsi thplsi htplsi lthpsi tlhpsi lhtpsi hltpsi thlpsi htlpsi silthp islthp slithp lsithp ilsthp listhp sitlhp istlhp stilhp tsilhp itslhp tislhp sltihp lstihp stlihp tslihp ltsihp tlsihp iltshp litshp itlshp tilshp ltishp tlishp silhtp islhtp slihtp lsihtp ilshtp lishtp sihltp ishltp shiltp hsiltp ihsltp hisltp slhitp lshitp shlitp hslitp lhsitp hlsitp ilhstp lihstp ihlstp hilstp lhistp hlistp sithlp isthlp stihlp tsihlp itshlp tishlp sihtlp ishtlp shitlp hsitlp ihstlp histlp sthilp tshilp shtilp hstilp thsilp htsilp ithslp tihslp ihtslp hitslp thislp htislp slthip lsthip stlhip tslhip ltship tlship slhtip lshtip shltip hsltip lhstip hlstip sthlip tshlip shtlip hstlip thslip htslip lthsip tlhsip lhtsip hltsip thlsip htlsip ilthsp lithsp itlhsp tilhsp ltihsp tlihsp ilhtsp lihtsp ihltsp hiltsp lhitsp hlitsp ithlsp tihlsp ihtlsp hitlsp thilsp htilsp lthisp tlhisp lhtisp hltisp thlisp htlisp pilths iplths pliths lpiths ilpths lipths pitlhs iptlhs ptilhs tpilhs itplhs tiplhs pltihs lptihs ptlihs tplihs ltpihs tlpihs iltphs litphs itlphs tilphs ltiphs tliphs pilhts iplhts plihts lpihts ilphts liphts pihlts iphlts philts hpilts ihplts hiplts plhits lphits phlits hplits lhpits hlpits ilhpts lihpts ihlpts hilpts lhipts hlipts pithls ipthls ptihls tpihls itphls tiphls pihtls iphtls phitls hpitls ihptls hiptls pthils tphils phtils hptils thpils htpils ithpls tihpls ihtpls hitpls thipls htipls plthis lpthis ptlhis tplhis ltphis tlphis plhtis lphtis phltis hpltis lhptis hlptis pthlis tphlis phtlis hptlis thplis htplis lthpis tlhpis lhtpis hltpis thlpis htlpis ilthps lithps itlhps tilhps ltihps tlihps ilhtps lihtps ihltps hiltps lhitps hlitps ithlps tihlps ihtlps hitlps thilps htilps lthips tlhips lhtips hltips thlips htlips
Note: these 'words' (valid or invalid) are all the permutations of the word spilth. These words are obtained by scrambling the letters in spilth.