safety asfety sfaety fsaety afsety fasety saefty asefty seafty esafty aesfty easfty sfeaty fseaty sefaty esfaty fesaty efsaty afesty faesty aefsty eafsty feasty efasty saftey asftey sfatey fsatey afstey fastey satfey astfey stafey tsafey atsfey tasfey sftaey fstaey stfaey tsfaey ftsaey tfsaey aftsey fatsey atfsey tafsey ftasey tfasey saetfy asetfy seatfy esatfy aestfy eastfy satefy astefy staefy tsaefy atsefy tasefy setafy estafy steafy tseafy etsafy tesafy aetsfy eatsfy atesfy taesfy etasfy teasfy sfetay fsetay seftay esftay festay efstay sfteay fsteay stfeay tsfeay ftseay tfseay setfay estfay stefay tsefay etsfay tesfay fetsay eftsay ftesay tfesay etfsay tefsay afetsy faetsy aeftsy eaftsy featsy efatsy aftesy fatesy atfesy tafesy ftaesy tfaesy aetfsy eatfsy atefsy taefsy etafsy teafsy fetasy eftasy fteasy tfeasy etfasy tefasy safeyt asfeyt sfaeyt fsaeyt afseyt faseyt saefyt asefyt seafyt esafyt aesfyt easfyt sfeayt fseayt sefayt esfayt fesayt efsayt afesyt faesyt aefsyt eafsyt feasyt efasyt safyet asfyet sfayet fsayet afsyet fasyet sayfet asyfet syafet ysafet aysfet yasfet sfyaet fsyaet syfaet ysfaet fysaet yfsaet afyset fayset ayfset yafset fyaset yfaset saeyft aseyft seayft esayft aesyft easyft sayeft asyeft syaeft ysaeft ayseft yaseft seyaft esyaft syeaft yseaft eysaft yesaft aeysft eaysft ayesft yaesft eyasft yeasft sfeyat fseyat sefyat esfyat fesyat efsyat sfyeat fsyeat syfeat ysfeat fyseat yfseat seyfat esyfat syefat ysefat eysfat yesfat feysat efysat fyesat yfesat eyfsat yefsat afeyst faeyst aefyst eafyst feayst efayst afyest fayest ayfest yafest fyaest yfaest aeyfst eayfst ayefst yaefst eyafst yeafst feyast efyast fyeast yfeast eyfast yefast saftye asftye sfatye fsatye afstye fastye satfye astfye stafye tsafye atsfye tasfye sftaye fstaye stfaye tsfaye ftsaye tfsaye aftsye fatsye atfsye tafsye ftasye tfasye safyte asfyte sfayte fsayte afsyte fasyte sayfte asyfte syafte ysafte aysfte yasfte sfyate fsyate syfate ysfate fysate yfsate afyste fayste ayfste yafste fyaste yfaste satyfe astyfe stayfe tsayfe atsyfe tasyfe saytfe asytfe syatfe ysatfe aystfe yastfe styafe tsyafe sytafe ystafe tysafe ytsafe atysfe taysfe aytsfe yatsfe tyasfe ytasfe sftyae fstyae stfyae tsfyae ftsyae tfsyae sfytae fsytae syftae ysftae fystae yfstae styfae tsyfae sytfae ystfae tysfae ytsfae ftysae tfysae fytsae yftsae tyfsae ytfsae aftyse fatyse atfyse tafyse ftayse tfayse afytse faytse ayftse yaftse fyatse yfatse atyfse tayfse aytfse yatfse tyafse ytafse ftyase tfyase fytase yftase tyfase ytfase saetyf asetyf seatyf esatyf aestyf eastyf sateyf asteyf staeyf tsaeyf atseyf taseyf setayf estayf steayf tseayf etsayf tesayf aetsyf eatsyf atesyf taesyf etasyf teasyf saeytf aseytf seaytf esaytf aesytf easytf sayetf asyetf syaetf ysaetf aysetf yasetf seyatf esyatf syeatf yseatf eysatf yesatf aeystf eaystf ayestf yaestf eyastf yeastf satyef astyef stayef tsayef atsyef tasyef saytef asytef syatef ysatef aystef yastef styaef tsyaef sytaef ystaef tysaef ytsaef atysef taysef aytsef yatsef tyasef ytasef setyaf estyaf steyaf tseyaf etsyaf tesyaf seytaf esytaf syetaf ysetaf eystaf yestaf styeaf tsyeaf syteaf ysteaf tyseaf ytseaf etysaf teysaf eytsaf yetsaf tyesaf ytesaf aetysf eatysf ateysf taeysf etaysf teaysf aeytsf eaytsf ayetsf yaetsf eyatsf yeatsf atyesf tayesf aytesf yatesf tyaesf ytaesf etyasf teyasf eytasf yetasf tyeasf yteasf sfetya fsetya seftya esftya festya efstya sfteya fsteya stfeya tsfeya ftseya tfseya setfya estfya stefya tsefya etsfya tesfya fetsya eftsya ftesya tfesya etfsya tefsya sfeyta fseyta sefyta esfyta fesyta efsyta sfyeta fsyeta syfeta ysfeta fyseta yfseta seyfta esyfta syefta ysefta eysfta yesfta feysta efysta fyesta yfesta eyfsta yefsta sftyea fstyea stfyea tsfyea ftsyea tfsyea sfytea fsytea syftea ysftea fystea yfstea styfea tsyfea sytfea ystfea tysfea ytsfea ftysea tfysea fytsea yftsea tyfsea ytfsea setyfa estyfa steyfa tseyfa etsyfa tesyfa seytfa esytfa syetfa ysetfa eystfa yestfa styefa tsyefa sytefa ystefa tysefa ytsefa etysfa teysfa eytsfa yetsfa tyesfa ytesfa fetysa eftysa fteysa tfeysa etfysa tefysa feytsa efytsa fyetsa yfetsa eyftsa yeftsa ftyesa tfyesa fytesa yftesa tyfesa ytfesa etyfsa teyfsa eytfsa yetfsa tyefsa ytefsa afetys faetys aeftys eaftys featys efatys afteys fateys atfeys tafeys ftaeys tfaeys aetfys eatfys atefys taefys etafys teafys fetays eftays fteays tfeays etfays tefays afeyts faeyts aefyts eafyts feayts efayts afyets fayets ayfets yafets fyaets yfaets aeyfts eayfts ayefts yaefts eyafts yeafts feyats efyats fyeats yfeats eyfats yefats aftyes fatyes atfyes tafyes ftayes tfayes afytes faytes ayftes yaftes fyates yfates atyfes tayfes aytfes yatfes tyafes ytafes ftyaes tfyaes fytaes yftaes tyfaes ytfaes aetyfs eatyfs ateyfs taeyfs etayfs teayfs aeytfs eaytfs ayetfs yaetfs eyatfs yeatfs atyefs tayefs aytefs yatefs tyaefs ytaefs etyafs teyafs eytafs yetafs tyeafs yteafs fetyas eftyas fteyas tfeyas etfyas tefyas feytas efytas fyetas yfetas eyftas yeftas ftyeas tfyeas fyteas yfteas tyfeas ytfeas etyfas teyfas eytfas yetfas tyefas ytefas
Note: these 'words' (valid or invalid) are all the permutations of the word safety. These words are obtained by scrambling the letters in safety.