leasts elasts laests alests ealsts aelsts lesats elsats lseats sleats eslats selats lasets alsets lsaets slaets aslets salets easlts aeslts esalts sealts aselts saelts leatss elatss laetss aletss ealtss aeltss letass eltass lteass tleass etlass telass latess altess ltaess tlaess atless taless eatlss aetlss etalss tealss atelss taelss lestas elstas lsetas sletas esltas seltas letsas eltsas ltesas tlesas etlsas telsas lsteas slteas ltseas tlseas stleas tsleas estlas setlas etslas teslas stelas tselas lastes alstes lsates slates asltes saltes latses altses ltases tlases atlses talses lstaes sltaes ltsaes tlsaes stlaes tslaes astles satles atsles tasles stales tsales eastls aestls esatls seatls asetls saetls eatsls aetsls etasls teasls atesls taesls estals setals etsals tesals steals tseals astels satels atsels tasels staels tsaels leasst elasst laesst alesst ealsst aelsst lesast elsast lseast sleast eslast selast lasest alsest lsaest slaest aslest salest easlst aeslst esalst sealst aselst saelst leasst elasst laesst alesst ealsst aelsst lesast elsast lseast sleast eslast selast lasest alsest lsaest slaest aslest salest easlst aeslst esalst sealst aselst saelst lessat elssat lsesat slesat eslsat selsat lessat elssat lsesat slesat eslsat selsat lsseat slseat lsseat slseat ssleat ssleat esslat seslat esslat seslat sselat sselat lasset alsset lsaset slaset aslset salset lasset alsset lsaset slaset aslset salset lssaet slsaet lssaet slsaet sslaet sslaet asslet saslet asslet saslet ssalet ssalet easslt aesslt esaslt seaslt aseslt saeslt easslt aesslt esaslt seaslt aseslt saeslt essalt sesalt essalt sesalt ssealt ssealt asselt saselt asselt saselt ssaelt ssaelt leatss elatss laetss aletss ealtss aeltss letass eltass lteass tleass etlass telass latess altess ltaess tlaess atless taless eatlss aetlss etalss tealss atelss taelss leasts elasts laests alests ealsts aelsts lesats elsats lseats sleats eslats selats lasets alsets lsaets slaets aslets salets easlts aeslts esalts sealts aselts saelts letsas eltsas ltesas tlesas etlsas telsas lestas elstas lsetas sletas esltas seltas ltseas tlseas lsteas slteas tsleas stleas etslas teslas estlas setlas tselas stelas latses altses ltases tlases atlses talses lastes alstes lsates slates asltes saltes ltsaes tlsaes lstaes sltaes tslaes stlaes atsles tasles astles satles tsales stales eatsls aetsls etasls teasls atesls taesls eastls aestls esatls seatls asetls saetls etsals tesals estals setals tseals steals atsels tasels astels satels tsaels staels lestsa elstsa lsetsa sletsa esltsa seltsa letssa eltssa ltessa tlessa etlssa telssa lstesa sltesa ltsesa tlsesa stlesa tslesa estlsa setlsa etslsa teslsa stelsa tselsa lessta elssta lsesta slesta eslsta selsta lessta elssta lsesta slesta eslsta selsta lsseta slseta lsseta slseta ssleta ssleta esslta seslta esslta seslta sselta sselta letssa eltssa ltessa tlessa etlssa telssa lestsa elstsa lsetsa sletsa esltsa seltsa ltsesa tlsesa lstesa sltesa tslesa stlesa etslsa teslsa estlsa setlsa tselsa stelsa lstsea sltsea ltssea tlssea stlsea tslsea lsstea slstea lsstea slstea ssltea ssltea ltssea tlssea lstsea sltsea tslsea stlsea stslea tsslea sstlea sstlea tsslea stslea estsla setsla etssla tessla stesla tsesla esstla sestla esstla sestla ssetla ssetla etssla tessla estsla setsla tsesla stesla stsela tssela sstela sstela tssela stsela lastse alstse lsatse slatse asltse saltse latsse altsse ltasse tlasse atlsse talsse lstase sltase ltsase tlsase stlase tslase astlse satlse atslse taslse stalse tsalse lasste alsste lsaste slaste aslste salste lasste alsste lsaste slaste aslste salste lssate slsate lssate slsate sslate sslate asslte saslte asslte saslte ssalte ssalte latsse altsse ltasse tlasse atlsse talsse lastse alstse lsatse slatse asltse saltse ltsase tlsase lstase sltase tslase stlase atslse taslse astlse satlse tsalse stalse lstsae sltsae ltssae tlssae stlsae tslsae lsstae slstae lsstae slstae ssltae ssltae ltssae tlssae lstsae sltsae tslsae stlsae stslae tsslae sstlae sstlae tsslae stslae astsle satsle atssle tassle stasle tsasle asstle sastle asstle sastle ssatle ssatle atssle tassle astsle satsle tsasle stasle stsale tssale sstale sstale tssale stsale eastsl aestsl esatsl seatsl asetsl saetsl eatssl aetssl etassl teassl atessl taessl estasl setasl etsasl tesasl steasl tseasl astesl satesl atsesl tasesl staesl tsaesl easstl aesstl esastl seastl asestl saestl easstl aesstl esastl seastl asestl saestl essatl sesatl essatl sesatl sseatl sseatl assetl sasetl assetl sasetl ssaetl ssaetl eatssl aetssl etassl teassl atessl taessl eastsl aestsl esatsl seatsl asetsl saetsl etsasl tesasl estasl setasl tseasl steasl atsesl tasesl astesl satesl tsaesl staesl estsal setsal etssal tessal stesal tsesal esstal sestal esstal sestal ssetal ssetal etssal tessal estsal setsal tsesal stesal stseal tsseal ssteal ssteal tsseal stseal astsel satsel atssel tassel stasel tsasel asstel sastel asstel sastel ssatel ssatel atssel tassel astsel satsel tsasel stasel stsael tssael sstael sstael tssael stsael
Note: these 'words' (valid or invalid) are all the permutations of the word leasts. These words are obtained by scrambling the letters in leasts.