flails lfails falils aflils lafils alfils flials lfials filals iflals lifals ilfals faills afills fialls ifalls aiflls iaflls laifls alifls liafls ilafls ailfls ialfls flalis lfalis fallis afllis laflis alflis fllais lflais fllais lflais llfais llfais fallis afllis flalis lfalis alflis laflis lalfis allfis llafis llafis allfis lalfis flilas lfilas fillas ifllas liflas ilflas fllias lflias fllias lflias llfias llfias fillas ifllas flilas lfilas ilflas liflas lilfas illfas llifas llifas illfas lilfas faills afills fialls ifalls aiflls iaflls falils aflils flails lfails alfils lafils filals iflals flials lfials ilfals lifals ailfls ialfls alifls laifls ilafls liafls lailfs alilfs lialfs ilalfs aillfs iallfs lalifs allifs llaifs llaifs allifs lalifs lilafs illafs lliafs lliafs illafs lilafs aillfs iallfs alilfs lailfs ilalfs lialfs flaisl lfaisl falisl aflisl lafisl alfisl fliasl lfiasl filasl iflasl lifasl ilfasl failsl afilsl fialsl ifalsl aiflsl iaflsl laifsl alifsl liafsl ilafsl ailfsl ialfsl flasil lfasil falsil aflsil lafsil alfsil flsail lfsail fslail sflail lsfail slfail faslil afslil fsalil sfalil asflil saflil lasfil alsfil lsafil slafil aslfil salfil flisal lfisal filsal iflsal lifsal ilfsal flsial lfsial fslial sflial lsfial slfial fislal ifslal fsilal sfilal isflal siflal lisfal ilsfal lsifal slifal islfal silfal faisll afisll fiasll ifasll aifsll iafsll fasill afsill fsaill sfaill asfill safill fisall ifsall fsiall sfiall isfall sifall aisfll iasfll asifll saifll isafll siafll laisfl alisfl liasfl ilasfl ailsfl ialsfl lasifl alsifl lsaifl slaifl aslifl salifl lisafl ilsafl lsiafl sliafl islafl silafl aislfl iaslfl asilfl sailfl isalfl sialfl flalsi lfalsi fallsi afllsi laflsi alflsi fllasi lflasi fllasi lflasi llfasi llfasi fallsi afllsi flalsi lfalsi alflsi laflsi lalfsi allfsi llafsi llafsi allfsi lalfsi flasli lfasli falsli aflsli lafsli alfsli flsali lfsali fslali sflali lsfali slfali faslli afslli fsalli sfalli asflli saflli lasfli alsfli lsafli slafli aslfli salfli fllsai lflsai fllsai lflsai llfsai llfsai flslai lfslai fsllai sfllai lsflai slflai flslai lfslai fsllai sfllai lsflai slflai llsfai llsfai lslfai sllfai lslfai sllfai falsli aflsli flasli lfasli alfsli lafsli faslli afslli fsalli sfalli asflli saflli flsali lfsali fslali sflali lsfali slfali alsfli lasfli aslfli salfli lsafli slafli lalsfi allsfi llasfi llasfi allsfi lalsfi laslfi alslfi lsalfi slalfi asllfi sallfi llsafi llsafi lslafi sllafi lslafi sllafi alslfi laslfi asllfi sallfi lsalfi slalfi flilsa lfilsa fillsa ifllsa liflsa ilflsa fllisa lflisa fllisa lflisa llfisa llfisa fillsa ifllsa flilsa lfilsa ilflsa liflsa lilfsa illfsa llifsa llifsa illfsa lilfsa flisla lfisla filsla iflsla lifsla ilfsla flsila lfsila fslila sflila lsfila slfila fislla ifslla fsilla sfilla isflla siflla lisfla ilsfla lsifla slifla islfla silfla fllsia lflsia fllsia lflsia llfsia llfsia flslia lfslia fsllia sfllia lsflia slflia flslia lfslia fsllia sfllia lsflia slflia llsfia llsfia lslfia sllfia lslfia sllfia filsla iflsla flisla lfisla ilfsla lifsla fislla ifslla fsilla sfilla isflla siflla flsila lfsila fslila sflila lsfila slfila ilsfla lisfla islfla silfla lsifla slifla lilsfa illsfa llisfa llisfa illsfa lilsfa lislfa ilslfa lsilfa slilfa isllfa sillfa llsifa llsifa lslifa sllifa lslifa sllifa ilslfa lislfa isllfa sillfa lsilfa slilfa failsl afilsl fialsl ifalsl aiflsl iaflsl falisl aflisl flaisl lfaisl alfisl lafisl filasl iflasl fliasl lfiasl ilfasl lifasl ailfsl ialfsl alifsl laifsl ilafsl liafsl faisll afisll fiasll ifasll aifsll iafsll fasill afsill fsaill sfaill asfill safill fisall ifsall fsiall sfiall isfall sifall aisfll iasfll asifll saifll isafll siafll falsil aflsil flasil lfasil alfsil lafsil faslil afslil fsalil sfalil asflil saflil flsail lfsail fslail sflail lsfail slfail alsfil lasfil aslfil salfil lsafil slafil filsal iflsal flisal lfisal ilfsal lifsal fislal ifslal fsilal sfilal isflal siflal flsial lfsial fslial sflial lsfial slfial ilsfal lisfal islfal silfal lsifal slifal ailsfl ialsfl alisfl laisfl ilasfl liasfl aislfl iaslfl asilfl sailfl isalfl sialfl alsifl lasifl aslifl salifl lsaifl slaifl ilsafl lisafl islafl silafl lsiafl sliafl lailsf alilsf lialsf ilalsf aillsf iallsf lalisf allisf llaisf llaisf allisf lalisf lilasf illasf lliasf lliasf illasf lilasf aillsf iallsf alilsf lailsf ilalsf lialsf laislf alislf liaslf ilaslf ailslf ialslf lasilf alsilf lsailf slailf aslilf salilf lisalf ilsalf lsialf slialf islalf silalf aisllf iasllf asillf saillf isallf siallf lalsif allsif llasif llasif allsif lalsif laslif alslif lsalif slalif asllif sallif llsaif llsaif lslaif sllaif lslaif sllaif alslif laslif asllif sallif lsalif slalif lilsaf illsaf llisaf llisaf illsaf lilsaf lislaf ilslaf lsilaf slilaf isllaf sillaf llsiaf llsiaf lsliaf slliaf lsliaf slliaf ilslaf lislaf isllaf sillaf lsilaf slilaf ailslf ialslf alislf laislf ilaslf liaslf aisllf iasllf asillf saillf isallf siallf alsilf lasilf aslilf salilf lsailf slailf ilsalf lisalf islalf silalf lsialf slialf
Note: these 'words' (valid or invalid) are all the permutations of the word flails. These words are obtained by scrambling the letters in flails.