felids eflids fleids lfeids elfids lefids feilds efilds fields ifelds eiflds ieflds flieds lfieds fileds ifleds lifeds ilfeds elifds leifds eilfds ielfds liefds ilefds feldis efldis fledis lfedis elfdis lefdis fedlis efdlis fdelis dfelis edflis deflis fldeis lfdeis fdleis dfleis ldfeis dlfeis eldfis ledfis edlfis delfis ldefis dlefis feidls efidls fiedls ifedls eifdls iefdls fedils efdils fdeils dfeils edfils defils fidels ifdels fdiels dfiels idfels difels eidfls iedfls edifls deifls idefls diefls flides lfides fildes ifldes lifdes ilfdes fldies lfdies fdlies dflies ldfies dlfies fidles ifdles fdiles dfiles idfles difles lidfes ildfes ldifes dlifes idlfes dilfes elidfs leidfs eildfs ieldfs liedfs iledfs eldifs ledifs edlifs delifs ldeifs dleifs eidlfs iedlfs edilfs deilfs idelfs dielfs lidefs ildefs ldiefs dliefs idlefs dilefs felisd eflisd fleisd lfeisd elfisd lefisd feilsd efilsd fielsd ifelsd eiflsd ieflsd fliesd lfiesd filesd iflesd lifesd ilfesd elifsd leifsd eilfsd ielfsd liefsd ilefsd felsid eflsid flesid lfesid elfsid lefsid feslid efslid fselid sfelid esflid seflid flseid lfseid fsleid sfleid lsfeid slfeid elsfid lesfid eslfid selfid lsefid slefid feisld efisld fiesld ifesld eifsld iefsld fesild efsild fseild sfeild esfild sefild fiseld ifseld fsield sfield isfeld sifeld eisfld iesfld esifld seifld isefld siefld flised lfised filsed iflsed lifsed ilfsed flsied lfsied fslied sflied lsfied slfied fisled ifsled fsiled sfiled isfled sifled lisfed ilsfed lsifed slifed islfed silfed elisfd leisfd eilsfd ielsfd liesfd ilesfd elsifd lesifd eslifd selifd lseifd sleifd eislfd ieslfd esilfd seilfd iselfd sielfd lisefd ilsefd lsiefd sliefd islefd silefd feldsi efldsi fledsi lfedsi elfdsi lefdsi fedlsi efdlsi fdelsi dfelsi edflsi deflsi fldesi lfdesi fdlesi dflesi ldfesi dlfesi eldfsi ledfsi edlfsi delfsi ldefsi dlefsi felsdi eflsdi flesdi lfesdi elfsdi lefsdi fesldi efsldi fseldi sfeldi esfldi sefldi flsedi lfsedi fsledi sfledi lsfedi slfedi elsfdi lesfdi eslfdi selfdi lsefdi slefdi fedsli efdsli fdesli dfesli edfsli defsli fesdli efsdli fsedli sfedli esfdli sefdli fdseli dfseli fsdeli sfdeli dsfeli sdfeli edsfli desfli esdfli sedfli dsefli sdefli fldsei lfdsei fdlsei dflsei ldfsei dlfsei flsdei lfsdei fsldei sfldei lsfdei slfdei fdslei dfslei fsdlei sfdlei dsflei sdflei ldsfei dlsfei lsdfei sldfei dslfei sdlfei eldsfi ledsfi edlsfi delsfi ldesfi dlesfi elsdfi lesdfi esldfi seldfi lsedfi sledfi edslfi deslfi esdlfi sedlfi dselfi sdelfi ldsefi dlsefi lsdefi sldefi dslefi sdlefi feidsl efidsl fiedsl ifedsl eifdsl iefdsl fedisl efdisl fdeisl dfeisl edfisl defisl fidesl ifdesl fdiesl dfiesl idfesl difesl eidfsl iedfsl edifsl deifsl idefsl diefsl feisdl efisdl fiesdl ifesdl eifsdl iefsdl fesidl efsidl fseidl sfeidl esfidl sefidl fisedl ifsedl fsiedl sfiedl isfedl sifedl eisfdl iesfdl esifdl seifdl isefdl siefdl fedsil efdsil fdesil dfesil edfsil defsil fesdil efsdil fsedil sfedil esfdil sefdil fdseil dfseil fsdeil sfdeil dsfeil sdfeil edsfil desfil esdfil sedfil dsefil sdefil fidsel ifdsel fdisel dfisel idfsel difsel fisdel ifsdel fsidel sfidel isfdel sifdel fdsiel dfsiel fsdiel sfdiel dsfiel sdfiel idsfel disfel isdfel sidfel dsifel sdifel eidsfl iedsfl edisfl deisfl idesfl diesfl eisdfl iesdfl esidfl seidfl isedfl siedfl edsifl desifl esdifl sedifl dseifl sdeifl idsefl disefl isdefl sidefl dsiefl sdiefl flidse lfidse fildse ifldse lifdse ilfdse fldise lfdise fdlise dflise ldfise dlfise fidlse ifdlse fdilse dfilse idflse diflse lidfse ildfse ldifse dlifse idlfse dilfse flisde lfisde filsde iflsde lifsde ilfsde flside lfside fslide sflide lsfide slfide fislde ifslde fsilde sfilde isflde siflde lisfde ilsfde lsifde slifde islfde silfde fldsie lfdsie fdlsie dflsie ldfsie dlfsie flsdie lfsdie fsldie sfldie lsfdie slfdie fdslie dfslie fsdlie sfdlie dsflie sdflie ldsfie dlsfie lsdfie sldfie dslfie sdlfie fidsle ifdsle fdisle dfisle idfsle difsle fisdle ifsdle fsidle sfidle isfdle sifdle fdsile dfsile fsdile sfdile dsfile sdfile idsfle disfle isdfle sidfle dsifle sdifle lidsfe ildsfe ldisfe dlisfe idlsfe dilsfe lisdfe ilsdfe lsidfe slidfe isldfe sildfe ldsife dlsife lsdife sldife dslife sdlife idslfe dislfe isdlfe sidlfe dsilfe sdilfe elidsf leidsf eildsf ieldsf liedsf iledsf eldisf ledisf edlisf delisf ldeisf dleisf eidlsf iedlsf edilsf deilsf idelsf dielsf lidesf ildesf ldiesf dliesf idlesf dilesf elisdf leisdf eilsdf ielsdf liesdf ilesdf elsidf lesidf eslidf selidf lseidf sleidf eisldf iesldf esildf seildf iseldf sieldf lisedf ilsedf lsiedf sliedf isledf siledf eldsif ledsif edlsif delsif ldesif dlesif elsdif lesdif esldif seldif lsedif sledif edslif deslif esdlif sedlif dselif sdelif ldseif dlseif lsdeif sldeif dsleif sdleif eidslf iedslf edislf deislf ideslf dieslf eisdlf iesdlf esidlf seidlf isedlf siedlf edsilf desilf esdilf sedilf dseilf sdeilf idself diself isdelf sidelf dsielf sdielf lidsef ildsef ldisef dlisef idlsef dilsef lisdef ilsdef lsidef slidef isldef sildef ldsief dlsief lsdief sldief dslief sdlief idslef dislef isdlef sidlef dsilef sdilef
Note: these 'words' (valid or invalid) are all the permutations of the word felids. These words are obtained by scrambling the letters in felids.