shirts hsirts sihrts ishrts hisrts ihsrts shrits hsrits srhits rshits hrsits rhsits sirhts isrhts srihts rsihts irshts rishts hirsts ihrsts hrists rhists irhsts rihsts shitrs hsitrs sihtrs ishtrs histrs ihstrs shtirs hstirs sthirs tshirs htsirs thsirs sithrs isthrs stihrs tsihrs itshrs tishrs hitsrs ihtsrs htisrs thisrs ithsrs tihsrs shrtis hsrtis srhtis rshtis hrstis rhstis shtris hstris sthris tshris htsris thsris srthis rsthis strhis tsrhis rtshis trshis hrtsis rhtsis htrsis thrsis rthsis trhsis sirths isrths sriths rsiths irsths risths sitrhs istrhs stirhs tsirhs itsrhs tisrhs srtihs rstihs strihs tsrihs rtsihs trsihs irtshs ritshs itrshs tirshs rtishs trishs hirtss ihrtss hritss rhitss irhtss rihtss hitrss ihtrss htirss thirss ithrss tihrss hrtiss rhtiss htriss thriss rthiss trhiss irthss rithss itrhss tirhss rtihss trihss shirst hsirst sihrst ishrst hisrst ihsrst shrist hsrist srhist rshist hrsist rhsist sirhst isrhst srihst rsihst irshst rishst hirsst ihrsst hrisst rhisst irhsst rihsst shisrt hsisrt sihsrt ishsrt hissrt ihssrt shsirt hssirt sshirt sshirt hssirt shsirt sishrt isshrt ssihrt ssihrt isshrt sishrt hissrt ihssrt hsisrt shisrt ishsrt sihsrt shrsit hsrsit srhsit rshsit hrssit rhssit shsrit hssrit sshrit sshrit hssrit shsrit srshit rsshit ssrhit ssrhit rsshit srshit hrssit rhssit hsrsit shrsit rshsit srhsit sirsht isrsht srisht rsisht irssht rissht sisrht issrht ssirht ssirht issrht sisrht srsiht rssiht ssriht ssriht rssiht srsiht irssht rissht isrsht sirsht rsisht srisht hirsst ihrsst hrisst rhisst irhsst rihsst hisrst ihsrst hsirst shirst ishrst sihrst hrsist rhsist hsrist shrist rshist srhist irshst rishst isrhst sirhst rsihst srihst shitsr hsitsr sihtsr ishtsr histsr ihstsr shtisr hstisr sthisr tshisr htsisr thsisr sithsr isthsr stihsr tsihsr itshsr tishsr hitssr ihtssr htissr thissr ithssr tihssr shistr hsistr sihstr ishstr hisstr ihsstr shsitr hssitr sshitr sshitr hssitr shsitr sishtr isshtr ssihtr ssihtr isshtr sishtr hisstr ihsstr hsistr shistr ishstr sihstr shtsir hstsir sthsir tshsir htssir thssir shstir hsstir sshtir sshtir hsstir shstir stshir tsshir ssthir ssthir tsshir stshir htssir thssir hstsir shtsir tshsir sthsir sitshr istshr stishr tsishr itsshr tisshr sisthr issthr ssithr ssithr issthr sisthr stsihr tssihr sstihr sstihr tssihr stsihr itsshr tisshr istshr sitshr tsishr stishr hitssr ihtssr htissr thissr ithssr tihssr histsr ihstsr hsitsr shitsr ishtsr sihtsr htsisr thsisr hstisr shtisr tshisr sthisr itshsr tishsr isthsr sithsr tsihsr stihsr shrtsi hsrtsi srhtsi rshtsi hrstsi rhstsi shtrsi hstrsi sthrsi tshrsi htsrsi thsrsi srthsi rsthsi strhsi tsrhsi rtshsi trshsi hrtssi rhtssi htrssi thrssi rthssi trhssi shrsti hsrsti srhsti rshsti hrssti rhssti shsrti hssrti sshrti sshrti hssrti shsrti srshti rsshti ssrhti ssrhti rsshti srshti hrssti rhssti hsrsti shrsti rshsti srhsti shtsri hstsri sthsri tshsri htssri thssri shstri hsstri sshtri sshtri hsstri shstri stshri tsshri ssthri ssthri tsshri stshri htssri thssri hstsri shtsri tshsri sthsri srtshi rstshi strshi tsrshi rtsshi trsshi srsthi rssthi ssrthi ssrthi rssthi srsthi stsrhi tssrhi sstrhi sstrhi tssrhi stsrhi rtsshi trsshi rstshi srtshi tsrshi strshi hrtssi rhtssi htrssi thrssi rthssi trhssi hrstsi rhstsi hsrtsi shrtsi rshtsi srhtsi htsrsi thsrsi hstrsi shtrsi tshrsi sthrsi rtshsi trshsi rsthsi srthsi tsrhsi strhsi sirtsh isrtsh sritsh rsitsh irstsh ristsh sitrsh istrsh stirsh tsirsh itsrsh tisrsh srtish rstish strish tsrish rtsish trsish irtssh ritssh itrssh tirssh rtissh trissh sirsth isrsth sristh rsisth irssth rissth sisrth issrth ssirth ssirth issrth sisrth srsith rssith ssrith ssrith rssith srsith irssth rissth isrsth sirsth rsisth sristh sitsrh istsrh stisrh tsisrh itssrh tissrh sistrh isstrh ssitrh ssitrh isstrh sistrh stsirh tssirh sstirh sstirh tssirh stsirh itssrh tissrh istsrh sitsrh tsisrh stisrh srtsih rstsih strsih tsrsih rtssih trssih srstih rsstih ssrtih ssrtih rsstih srstih stsrih tssrih sstrih sstrih tssrih stsrih rtssih trssih rstsih srtsih tsrsih strsih irtssh ritssh itrssh tirssh rtissh trissh irstsh ristsh isrtsh sirtsh rsitsh sritsh itsrsh tisrsh istrsh sitrsh tsirsh stirsh rtsish trsish rstish srtish tsrish strish hirtss ihrtss hritss rhitss irhtss rihtss hitrss ihtrss htirss thirss ithrss tihrss hrtiss rhtiss htriss thriss rthiss trhiss irthss rithss itrhss tirhss rtihss trihss hirsts ihrsts hrists rhists irhsts rihsts hisrts ihsrts hsirts shirts ishrts sihrts hrsits rhsits hsrits shrits rshits srhits irshts rishts isrhts sirhts rsihts srihts hitsrs ihtsrs htisrs thisrs ithsrs tihsrs histrs ihstrs hsitrs shitrs ishtrs sihtrs htsirs thsirs hstirs shtirs tshirs sthirs itshrs tishrs isthrs sithrs tsihrs stihrs hrtsis rhtsis htrsis thrsis rthsis trhsis hrstis rhstis hsrtis shrtis rshtis srhtis htsris thsris hstris shtris tshris sthris rtshis trshis rsthis srthis tsrhis strhis irtshs ritshs itrshs tirshs rtishs trishs irsths risths isrths sirths rsiths sriths itsrhs tisrhs istrhs sitrhs tsirhs stirhs rtsihs trsihs rstihs srtihs tsrihs strihs
Note: these 'words' (valid or invalid) are all the permutations of the word shirts. These words are obtained by scrambling the letters in shirts.