heasts ehasts haests ahests eahsts aehsts hesats ehsats hseats sheats eshats sehats hasets ahsets hsaets shaets ashets sahets eashts aeshts esahts seahts asehts saehts heatss ehatss haetss ahetss eahtss aehtss hetass ehtass hteass theass ethass tehass hatess ahtess htaess thaess athess tahess eathss aethss etahss teahss atehss taehss hestas ehstas hsetas shetas eshtas sehtas hetsas ehtsas htesas thesas ethsas tehsas hsteas shteas htseas thseas stheas tsheas esthas sethas etshas teshas stehas tsehas hastes ahstes hsates shates ashtes sahtes hatses ahtses htases thases athses tahses hstaes shtaes htsaes thsaes sthaes tshaes asthes sathes atshes tashes stahes tsahes easths aesths esaths seaths aseths saeths eatshs aetshs etashs teashs ateshs taeshs estahs setahs etsahs tesahs steahs tseahs astehs satehs atsehs tasehs staehs tsaehs heasst ehasst haesst ahesst eahsst aehsst hesast ehsast hseast sheast eshast sehast hasest ahsest hsaest shaest ashest sahest eashst aeshst esahst seahst asehst saehst heasst ehasst haesst ahesst eahsst aehsst hesast ehsast hseast sheast eshast sehast hasest ahsest hsaest shaest ashest sahest eashst aeshst esahst seahst asehst saehst hessat ehssat hsesat shesat eshsat sehsat hessat ehssat hsesat shesat eshsat sehsat hsseat shseat hsseat shseat ssheat ssheat esshat seshat esshat seshat ssehat ssehat hasset ahsset hsaset shaset ashset sahset hasset ahsset hsaset shaset ashset sahset hssaet shsaet hssaet shsaet sshaet sshaet asshet sashet asshet sashet ssahet ssahet eassht aessht esasht seasht asesht saesht eassht aessht esasht seasht asesht saesht essaht sesaht essaht sesaht sseaht sseaht asseht saseht asseht saseht ssaeht ssaeht heatss ehatss haetss ahetss eahtss aehtss hetass ehtass hteass theass ethass tehass hatess ahtess htaess thaess athess tahess eathss aethss etahss teahss atehss taehss heasts ehasts haests ahests eahsts aehsts hesats ehsats hseats sheats eshats sehats hasets ahsets hsaets shaets ashets sahets eashts aeshts esahts seahts asehts saehts hetsas ehtsas htesas thesas ethsas tehsas hestas ehstas hsetas shetas eshtas sehtas htseas thseas hsteas shteas tsheas stheas etshas teshas esthas sethas tsehas stehas hatses ahtses htases thases athses tahses hastes ahstes hsates shates ashtes sahtes htsaes thsaes hstaes shtaes tshaes sthaes atshes tashes asthes sathes tsahes stahes eatshs aetshs etashs teashs ateshs taeshs easths aesths esaths seaths aseths saeths etsahs tesahs estahs setahs tseahs steahs atsehs tasehs astehs satehs tsaehs staehs hestsa ehstsa hsetsa shetsa eshtsa sehtsa hetssa ehtssa htessa thessa ethssa tehssa hstesa shtesa htsesa thsesa sthesa tshesa esthsa sethsa etshsa teshsa stehsa tsehsa hessta ehssta hsesta shesta eshsta sehsta hessta ehssta hsesta shesta eshsta sehsta hsseta shseta hsseta shseta ssheta ssheta esshta seshta esshta seshta ssehta ssehta hetssa ehtssa htessa thessa ethssa tehssa hestsa ehstsa hsetsa shetsa eshtsa sehtsa htsesa thsesa hstesa shtesa tshesa sthesa etshsa teshsa esthsa sethsa tsehsa stehsa hstsea shtsea htssea thssea sthsea tshsea hsstea shstea hsstea shstea sshtea sshtea htssea thssea hstsea shtsea tshsea sthsea stshea tsshea ssthea ssthea tsshea stshea estsha setsha etssha tessha stesha tsesha esstha sestha esstha sestha ssetha ssetha etssha tessha estsha setsha tsesha stesha stseha tsseha ssteha ssteha tsseha stseha hastse ahstse hsatse shatse ashtse sahtse hatsse ahtsse htasse thasse athsse tahsse hstase shtase htsase thsase sthase tshase asthse sathse atshse tashse stahse tsahse hasste ahsste hsaste shaste ashste sahste hasste ahsste hsaste shaste ashste sahste hssate shsate hssate shsate sshate sshate asshte sashte asshte sashte ssahte ssahte hatsse ahtsse htasse thasse athsse tahsse hastse ahstse hsatse shatse ashtse sahtse htsase thsase hstase shtase tshase sthase atshse tashse asthse sathse tsahse stahse hstsae shtsae htssae thssae sthsae tshsae hsstae shstae hsstae shstae sshtae sshtae htssae thssae hstsae shtsae tshsae sthsae stshae tsshae ssthae ssthae tsshae stshae astshe satshe atsshe tasshe stashe tsashe assthe sasthe assthe sasthe ssathe ssathe atsshe tasshe astshe satshe tsashe stashe stsahe tssahe sstahe sstahe tssahe stsahe eastsh aestsh esatsh seatsh asetsh saetsh eatssh aetssh etassh teassh atessh taessh estash setash etsash tesash steash tseash astesh satesh atsesh tasesh staesh tsaesh eassth aessth esasth seasth asesth saesth eassth aessth esasth seasth asesth saesth essath sesath essath sesath sseath sseath asseth saseth asseth saseth ssaeth ssaeth eatssh aetssh etassh teassh atessh taessh eastsh aestsh esatsh seatsh asetsh saetsh etsash tesash estash setash tseash steash atsesh tasesh astesh satesh tsaesh staesh estsah setsah etssah tessah stesah tsesah esstah sestah esstah sestah ssetah ssetah etssah tessah estsah setsah tsesah stesah stseah tsseah ssteah ssteah tsseah stseah astseh satseh atsseh tasseh staseh tsaseh assteh sasteh assteh sasteh ssateh ssateh atsseh tasseh astseh satseh tsaseh staseh stsaeh tssaeh sstaeh sstaeh tssaeh stsaeh
Note: these 'words' (valid or invalid) are all the permutations of the word heasts. These words are obtained by scrambling the letters in heasts.