sludgy lsudgy suldgy usldgy lusdgy ulsdgy sldugy lsdugy sdlugy dslugy ldsugy dlsugy sudlgy usdlgy sdulgy dsulgy udslgy duslgy ludsgy uldsgy ldusgy dlusgy udlsgy dulsgy slugdy lsugdy sulgdy uslgdy lusgdy ulsgdy slgudy lsgudy sgludy gsludy lgsudy glsudy sugldy usgldy sguldy gsuldy ugsldy gusldy lugsdy ulgsdy lgusdy glusdy uglsdy gulsdy sldguy lsdguy sdlguy dslguy ldsguy dlsguy slgduy lsgduy sglduy gslduy lgsduy glsduy sdgluy dsgluy sgdluy gsdluy dgsluy gdsluy ldgsuy dlgsuy lgdsuy gldsuy dglsuy gdlsuy sudgly usdgly sdugly dsugly udsgly dusgly sugdly usgdly sgudly gsudly ugsdly gusdly sdguly dsguly sgduly gsduly dgsuly gdsuly udgsly dugsly ugdsly gudsly dgusly gdusly ludgsy uldgsy ldugsy dlugsy udlgsy dulgsy lugdsy ulgdsy lgudsy gludsy ugldsy guldsy ldgusy dlgusy lgdusy gldusy dglusy gdlusy udglsy duglsy ugdlsy gudlsy dgulsy gdulsy sludyg lsudyg suldyg usldyg lusdyg ulsdyg slduyg lsduyg sdluyg dsluyg ldsuyg dlsuyg sudlyg usdlyg sdulyg dsulyg udslyg duslyg ludsyg uldsyg ldusyg dlusyg udlsyg dulsyg sluydg lsuydg sulydg uslydg lusydg ulsydg slyudg lsyudg syludg ysludg lysudg ylsudg suyldg usyldg syuldg ysuldg uysldg yusldg luysdg ulysdg lyusdg ylusdg uylsdg yulsdg sldyug lsdyug sdlyug dslyug ldsyug dlsyug slydug lsydug syldug ysldug lysdug ylsdug sdylug dsylug sydlug ysdlug dyslug ydslug ldysug dlysug lydsug yldsug dylsug ydlsug sudylg usdylg sduylg dsuylg udsylg dusylg suydlg usydlg syudlg ysudlg uysdlg yusdlg sdyulg dsyulg sydulg ysdulg dysulg ydsulg udyslg duyslg uydslg yudslg dyuslg yduslg ludysg uldysg lduysg dluysg udlysg dulysg luydsg ulydsg lyudsg yludsg uyldsg yuldsg ldyusg dlyusg lydusg yldusg dylusg ydlusg udylsg duylsg uydlsg yudlsg dyulsg ydulsg slugyd lsugyd sulgyd uslgyd lusgyd ulsgyd slguyd lsguyd sgluyd gsluyd lgsuyd glsuyd suglyd usglyd sgulyd gsulyd ugslyd guslyd lugsyd ulgsyd lgusyd glusyd uglsyd gulsyd sluygd lsuygd sulygd uslygd lusygd ulsygd slyugd lsyugd sylugd yslugd lysugd ylsugd suylgd usylgd syulgd ysulgd uyslgd yuslgd luysgd ulysgd lyusgd ylusgd uylsgd yulsgd slgyud lsgyud sglyud gslyud lgsyud glsyud slygud lsygud sylgud yslgud lysgud ylsgud sgylud gsylud syglud ysglud gyslud ygslud lgysud glysud lygsud ylgsud gylsud yglsud sugyld usgyld sguyld gsuyld ugsyld gusyld suygld usygld syugld ysugld uysgld yusgld sgyuld gsyuld syguld ysguld gysuld ygsuld ugysld guysld uygsld yugsld gyusld ygusld lugysd ulgysd lguysd gluysd uglysd gulysd luygsd ulygsd lyugsd ylugsd uylgsd yulgsd lgyusd glyusd lygusd ylgusd gylusd yglusd ugylsd guylsd uyglsd yuglsd gyulsd ygulsd sldgyu lsdgyu sdlgyu dslgyu ldsgyu dlsgyu slgdyu lsgdyu sgldyu gsldyu lgsdyu glsdyu sdglyu dsglyu sgdlyu gsdlyu dgslyu gdslyu ldgsyu dlgsyu lgdsyu gldsyu dglsyu gdlsyu sldygu lsdygu sdlygu dslygu ldsygu dlsygu slydgu lsydgu syldgu ysldgu lysdgu ylsdgu sdylgu dsylgu sydlgu ysdlgu dyslgu ydslgu ldysgu dlysgu lydsgu yldsgu dylsgu ydlsgu slgydu lsgydu sglydu gslydu lgsydu glsydu slygdu lsygdu sylgdu yslgdu lysgdu ylsgdu sgyldu gsyldu sygldu ysgldu gysldu ygsldu lgysdu glysdu lygsdu ylgsdu gylsdu yglsdu sdgylu dsgylu sgdylu gsdylu dgsylu gdsylu sdyglu dsyglu sydglu ysdglu dysglu ydsglu sgydlu gsydlu sygdlu ysgdlu gysdlu ygsdlu dgyslu gdyslu dygslu ydgslu gydslu ygdslu ldgysu dlgysu lgdysu gldysu dglysu gdlysu ldygsu dlygsu lydgsu yldgsu dylgsu ydlgsu lgydsu glydsu lygdsu ylgdsu gyldsu ygldsu dgylsu gdylsu dyglsu ydglsu gydlsu ygdlsu sudgyl usdgyl sdugyl dsugyl udsgyl dusgyl sugdyl usgdyl sgudyl gsudyl ugsdyl gusdyl sdguyl dsguyl sgduyl gsduyl dgsuyl gdsuyl udgsyl dugsyl ugdsyl gudsyl dgusyl gdusyl sudygl usdygl sduygl dsuygl udsygl dusygl suydgl usydgl syudgl ysudgl uysdgl yusdgl sdyugl dsyugl sydugl ysdugl dysugl ydsugl udysgl duysgl uydsgl yudsgl dyusgl ydusgl sugydl usgydl sguydl gsuydl ugsydl gusydl suygdl usygdl syugdl ysugdl uysgdl yusgdl sgyudl gsyudl sygudl ysgudl gysudl ygsudl ugysdl guysdl uygsdl yugsdl gyusdl ygusdl sdgyul dsgyul sgdyul gsdyul dgsyul gdsyul sdygul dsygul sydgul ysdgul dysgul ydsgul sgydul gsydul sygdul ysgdul gysdul ygsdul dgysul gdysul dygsul ydgsul gydsul ygdsul udgysl dugysl ugdysl gudysl dguysl gduysl udygsl duygsl uydgsl yudgsl dyugsl ydugsl ugydsl guydsl uygdsl yugdsl gyudsl ygudsl dgyusl gdyusl dygusl ydgusl gydusl ygdusl ludgys uldgys ldugys dlugys udlgys dulgys lugdys ulgdys lgudys gludys ugldys guldys ldguys dlguys lgduys glduys dgluys gdluys udglys duglys ugdlys gudlys dgulys gdulys ludygs uldygs lduygs dluygs udlygs dulygs luydgs ulydgs lyudgs yludgs uyldgs yuldgs ldyugs dlyugs lydugs yldugs dylugs ydlugs udylgs duylgs uydlgs yudlgs dyulgs ydulgs lugyds ulgyds lguyds gluyds uglyds gulyds luygds ulygds lyugds ylugds uylgds yulgds lgyuds glyuds lyguds ylguds gyluds ygluds ugylds guylds uyglds yuglds gyulds ygulds ldgyus dlgyus lgdyus gldyus dglyus gdlyus ldygus dlygus lydgus yldgus dylgus ydlgus lgydus glydus lygdus ylgdus gyldus ygldus dgylus gdylus dyglus ydglus gydlus ygdlus udgyls dugyls ugdyls gudyls dguyls gduyls udygls duygls uydgls yudgls dyugls ydugls ugydls guydls uygdls yugdls gyudls ygudls dgyuls gdyuls dyguls ydguls gyduls ygduls
Note: these 'words' (valid or invalid) are all the permutations of the word sludgy. These words are obtained by scrambling the letters in sludgy.