frails rfails farils afrils rafils arfils frials rfials firals ifrals rifals irfals fairls afirls fiarls ifarls aifrls iafrls raifls arifls riafls irafls airfls iarfls fralis rfalis farlis afrlis raflis arflis frlais rflais flrais lfrais rlfais lrfais falris aflris flaris lfaris alfris lafris ralfis arlfis rlafis lrafis alrfis larfis frilas rfilas firlas ifrlas riflas irflas frlias rflias flrias lfrias rlfias lrfias filras iflras fliras lfiras ilfras lifras rilfas irlfas rlifas lrifas ilrfas lirfas failrs afilrs fialrs ifalrs aiflrs iaflrs falirs aflirs flairs lfairs alfirs lafirs filars iflars fliars lfiars ilfars lifars ailfrs ialfrs alifrs laifrs ilafrs liafrs railfs arilfs rialfs iralfs airlfs iarlfs ralifs arlifs rlaifs lraifs alrifs larifs rilafs irlafs rliafs lriafs ilrafs lirafs ailrfs ialrfs alirfs lairfs ilarfs liarfs fraisl rfaisl farisl afrisl rafisl arfisl friasl rfiasl firasl ifrasl rifasl irfasl fairsl afirsl fiarsl ifarsl aifrsl iafrsl raifsl arifsl riafsl irafsl airfsl iarfsl frasil rfasil farsil afrsil rafsil arfsil frsail rfsail fsrail sfrail rsfail srfail fasril afsril fsaril sfaril asfril safril rasfil arsfil rsafil srafil asrfil sarfil frisal rfisal firsal ifrsal rifsal irfsal frsial rfsial fsrial sfrial rsfial srfial fisral ifsral fsiral sfiral isfral sifral risfal irsfal rsifal srifal isrfal sirfal faisrl afisrl fiasrl ifasrl aifsrl iafsrl fasirl afsirl fsairl sfairl asfirl safirl fisarl ifsarl fsiarl sfiarl isfarl sifarl aisfrl iasfrl asifrl saifrl isafrl siafrl raisfl arisfl riasfl irasfl airsfl iarsfl rasifl arsifl rsaifl sraifl asrifl sarifl risafl irsafl rsiafl sriafl israfl sirafl aisrfl iasrfl asirfl sairfl isarfl siarfl fralsi rfalsi farlsi afrlsi raflsi arflsi frlasi rflasi flrasi lfrasi rlfasi lrfasi falrsi aflrsi flarsi lfarsi alfrsi lafrsi ralfsi arlfsi rlafsi lrafsi alrfsi larfsi frasli rfasli farsli afrsli rafsli arfsli frsali rfsali fsrali sfrali rsfali srfali fasrli afsrli fsarli sfarli asfrli safrli rasfli arsfli rsafli srafli asrfli sarfli frlsai rflsai flrsai lfrsai rlfsai lrfsai frslai rfslai fsrlai sfrlai rsflai srflai flsrai lfsrai fslrai sflrai lsfrai slfrai rlsfai lrsfai rslfai srlfai lsrfai slrfai falsri aflsri flasri lfasri alfsri lafsri faslri afslri fsalri sfalri asflri saflri flsari lfsari fslari sflari lsfari slfari alsfri lasfri aslfri salfri lsafri slafri ralsfi arlsfi rlasfi lrasfi alrsfi larsfi raslfi arslfi rsalfi sralfi asrlfi sarlfi rlsafi lrsafi rslafi srlafi lsrafi slrafi alsrfi lasrfi aslrfi salrfi lsarfi slarfi frilsa rfilsa firlsa ifrlsa riflsa irflsa frlisa rflisa flrisa lfrisa rlfisa lrfisa filrsa iflrsa flirsa lfirsa ilfrsa lifrsa rilfsa irlfsa rlifsa lrifsa ilrfsa lirfsa frisla rfisla firsla ifrsla rifsla irfsla frsila rfsila fsrila sfrila rsfila srfila fisrla ifsrla fsirla sfirla isfrla sifrla risfla irsfla rsifla srifla isrfla sirfla frlsia rflsia flrsia lfrsia rlfsia lrfsia frslia rfslia fsrlia sfrlia rsflia srflia flsria lfsria fslria sflria lsfria slfria rlsfia lrsfia rslfia srlfia lsrfia slrfia filsra iflsra flisra lfisra ilfsra lifsra fislra ifslra fsilra sfilra isflra siflra flsira lfsira fslira sflira lsfira slfira ilsfra lisfra islfra silfra lsifra slifra rilsfa irlsfa rlisfa lrisfa ilrsfa lirsfa rislfa irslfa rsilfa srilfa isrlfa sirlfa rlsifa lrsifa rslifa srlifa lsrifa slrifa ilsrfa lisrfa islrfa silrfa lsirfa slirfa failsr afilsr fialsr ifalsr aiflsr iaflsr falisr aflisr flaisr lfaisr alfisr lafisr filasr iflasr fliasr lfiasr ilfasr lifasr ailfsr ialfsr alifsr laifsr ilafsr liafsr faislr afislr fiaslr ifaslr aifslr iafslr fasilr afsilr fsailr sfailr asfilr safilr fisalr ifsalr fsialr sfialr isfalr sifalr aisflr iasflr asiflr saiflr isaflr siaflr falsir aflsir flasir lfasir alfsir lafsir faslir afslir fsalir sfalir asflir saflir flsair lfsair fslair sflair lsfair slfair alsfir lasfir aslfir salfir lsafir slafir filsar iflsar flisar lfisar ilfsar lifsar fislar ifslar fsilar sfilar isflar siflar flsiar lfsiar fsliar sfliar lsfiar slfiar ilsfar lisfar islfar silfar lsifar slifar ailsfr ialsfr alisfr laisfr ilasfr liasfr aislfr iaslfr asilfr sailfr isalfr sialfr alsifr lasifr aslifr salifr lsaifr slaifr ilsafr lisafr islafr silafr lsiafr sliafr railsf arilsf rialsf iralsf airlsf iarlsf ralisf arlisf rlaisf lraisf alrisf larisf rilasf irlasf rliasf lriasf ilrasf lirasf ailrsf ialrsf alirsf lairsf ilarsf liarsf raislf arislf riaslf iraslf airslf iarslf rasilf arsilf rsailf srailf asrilf sarilf risalf irsalf rsialf srialf isralf siralf aisrlf iasrlf asirlf sairlf isarlf siarlf ralsif arlsif rlasif lrasif alrsif larsif raslif arslif rsalif sralif asrlif sarlif rlsaif lrsaif rslaif srlaif lsraif slraif alsrif lasrif aslrif salrif lsarif slarif rilsaf irlsaf rlisaf lrisaf ilrsaf lirsaf rislaf irslaf rsilaf srilaf isrlaf sirlaf rlsiaf lrsiaf rsliaf srliaf lsriaf slriaf ilsraf lisraf islraf silraf lsiraf sliraf ailsrf ialsrf alisrf laisrf ilasrf liasrf aislrf iaslrf asilrf sailrf isalrf sialrf alsirf lasirf aslirf salirf lsairf slairf ilsarf lisarf islarf silarf lsiarf sliarf
Note: these 'words' (valid or invalid) are all the permutations of the word frails. These words are obtained by scrambling the letters in frails.