lights ilghts lgihts glihts iglhts gilhts lihgts ilhgts lhigts hligts ihlgts hilgts lghits glhits lhgits hlgits ghlits hglits ighlts gihlts ihglts higlts ghilts hgilts ligths ilgths lgiths gliths iglths gilths litghs iltghs ltighs tlighs itlghs tilghs lgtihs gltihs ltgihs tlgihs gtlihs tglihs igtlhs gitlhs itglhs tiglhs gtilhs tgilhs lihtgs ilhtgs lhitgs hlitgs ihltgs hiltgs lithgs ilthgs ltihgs tlihgs itlhgs tilhgs lhtigs hltigs lthigs tlhigs htligs thligs ihtlgs hitlgs ithlgs tihlgs htilgs thilgs lghtis glhtis lhgtis hlgtis ghltis hgltis lgthis glthis ltghis tlghis gtlhis tglhis lhtgis hltgis lthgis tlhgis htlgis thlgis ghtlis hgtlis gthlis tghlis htglis thglis ightls gihtls ihgtls higtls ghitls hgitls igthls githls itghls tighls gtihls tgihls ihtgls hitgls ithgls tihgls htigls thigls ghtils hgtils gthils tghils htgils thgils lighst ilghst lgihst glihst iglhst gilhst lihgst ilhgst lhigst hligst ihlgst hilgst lghist glhist lhgist hlgist ghlist hglist ighlst gihlst ihglst higlst ghilst hgilst ligsht ilgsht lgisht glisht iglsht gilsht lisght ilsght lsight slight islght silght lgsiht glsiht lsgiht slgiht gsliht sgliht igslht gislht isglht siglht gsilht sgilht lihsgt ilhsgt lhisgt hlisgt ihlsgt hilsgt lishgt ilshgt lsihgt slihgt islhgt silhgt lhsigt hlsigt lshigt slhigt hsligt shligt ihslgt hislgt ishlgt sihlgt hsilgt shilgt lghsit glhsit lhgsit hlgsit ghlsit hglsit lgshit glshit lsghit slghit gslhit sglhit lhsgit hlsgit lshgit slhgit hslgit shlgit ghslit hgslit gshlit sghlit hsglit shglit ighslt gihslt ihgslt higslt ghislt hgislt igshlt gishlt isghlt sighlt gsihlt sgihlt ihsglt hisglt ishglt sihglt hsiglt shiglt ghsilt hgsilt gshilt sghilt hsgilt shgilt ligtsh ilgtsh lgitsh glitsh igltsh giltsh litgsh iltgsh ltigsh tligsh itlgsh tilgsh lgtish gltish ltgish tlgish gtlish tglish igtlsh gitlsh itglsh tiglsh gtilsh tgilsh ligsth ilgsth lgisth glisth iglsth gilsth lisgth ilsgth lsigth sligth islgth silgth lgsith glsith lsgith slgith gslith sglith igslth gislth isglth siglth gsilth sgilth litsgh iltsgh ltisgh tlisgh itlsgh tilsgh listgh ilstgh lsitgh slitgh isltgh siltgh ltsigh tlsigh lstigh sltigh tsligh stligh itslgh tislgh istlgh sitlgh tsilgh stilgh lgtsih gltsih ltgsih tlgsih gtlsih tglsih lgstih glstih lsgtih slgtih gsltih sgltih ltsgih tlsgih lstgih sltgih tslgih stlgih gtslih tgslih gstlih sgtlih tsglih stglih igtslh gitslh itgslh tigslh gtislh tgislh igstlh gistlh isgtlh sigtlh gsitlh sgitlh itsglh tisglh istglh sitglh tsiglh stiglh gtsilh tgsilh gstilh sgtilh tsgilh stgilh lihtsg ilhtsg lhitsg hlitsg ihltsg hiltsg lithsg ilthsg ltihsg tlihsg itlhsg tilhsg lhtisg hltisg lthisg tlhisg htlisg thlisg ihtlsg hitlsg ithlsg tihlsg htilsg thilsg lihstg ilhstg lhistg hlistg ihlstg hilstg lishtg ilshtg lsihtg slihtg islhtg silhtg lhsitg hlsitg lshitg slhitg hslitg shlitg ihsltg hisltg ishltg sihltg hsiltg shiltg litshg iltshg ltishg tlishg itlshg tilshg listhg ilsthg lsithg slithg islthg silthg ltsihg tlsihg lstihg sltihg tslihg stlihg itslhg tislhg istlhg sitlhg tsilhg stilhg lhtsig hltsig lthsig tlhsig htlsig thlsig lhstig hlstig lshtig slhtig hsltig shltig ltshig tlshig lsthig slthig tslhig stlhig htslig thslig hstlig shtlig tshlig sthlig ihtslg hitslg ithslg tihslg htislg thislg ihstlg histlg ishtlg sihtlg hsitlg shitlg itshlg tishlg isthlg sithlg tsihlg stihlg htsilg thsilg hstilg shtilg tshilg sthilg lghtsi glhtsi lhgtsi hlgtsi ghltsi hgltsi lgthsi glthsi ltghsi tlghsi gtlhsi tglhsi lhtgsi hltgsi lthgsi tlhgsi htlgsi thlgsi ghtlsi hgtlsi gthlsi tghlsi htglsi thglsi lghsti glhsti lhgsti hlgsti ghlsti hglsti lgshti glshti lsghti slghti gslhti sglhti lhsgti hlsgti lshgti slhgti hslgti shlgti ghslti hgslti gshlti sghlti hsglti shglti lgtshi gltshi ltgshi tlgshi gtlshi tglshi lgsthi glsthi lsgthi slgthi gslthi sglthi ltsghi tlsghi lstghi sltghi tslghi stlghi gtslhi tgslhi gstlhi sgtlhi tsglhi stglhi lhtsgi hltsgi lthsgi tlhsgi htlsgi thlsgi lhstgi hlstgi lshtgi slhtgi hsltgi shltgi ltshgi tlshgi lsthgi slthgi tslhgi stlhgi htslgi thslgi hstlgi shtlgi tshlgi sthlgi ghtsli hgtsli gthsli tghsli htgsli thgsli ghstli hgstli gshtli sghtli hsgtli shgtli gtshli tgshli gsthli sgthli tsghli stghli htsgli thsgli hstgli shtgli tshgli sthgli ightsl gihtsl ihgtsl higtsl ghitsl hgitsl igthsl githsl itghsl tighsl gtihsl tgihsl ihtgsl hitgsl ithgsl tihgsl htigsl thigsl ghtisl hgtisl gthisl tghisl htgisl thgisl ighstl gihstl ihgstl higstl ghistl hgistl igshtl gishtl isghtl sightl gsihtl sgihtl ihsgtl hisgtl ishgtl sihgtl hsigtl shigtl ghsitl hgsitl gshitl sghitl hsgitl shgitl igtshl gitshl itgshl tigshl gtishl tgishl igsthl gisthl isgthl sigthl gsithl sgithl itsghl tisghl istghl sitghl tsighl stighl gtsihl tgsihl gstihl sgtihl tsgihl stgihl ihtsgl hitsgl ithsgl tihsgl htisgl thisgl ihstgl histgl ishtgl sihtgl hsitgl shitgl itshgl tishgl isthgl sithgl tsihgl stihgl htsigl thsigl hstigl shtigl tshigl sthigl ghtsil hgtsil gthsil tghsil htgsil thgsil ghstil hgstil gshtil sghtil hsgtil shgtil gtshil tgshil gsthil sgthil tsghil stghil htsgil thsgil hstgil shtgil tshgil sthgil
Note: these 'words' (valid or invalid) are all the permutations of the word lights. These words are obtained by scrambling the letters in lights.