safest asfest sfaest fsaest afsest fasest saefst asefst seafst esafst aesfst easfst sfeast fseast sefast esfast fesast efsast afesst faesst aefsst eafsst feasst efasst safset asfset sfaset fsaset afsset fasset sasfet assfet ssafet ssafet assfet sasfet sfsaet fssaet ssfaet ssfaet fssaet sfsaet afsset fasset asfset safset fsaset sfaset saesft asesft seasft esasft aessft eassft saseft asseft ssaeft ssaeft asseft saseft sesaft essaft sseaft sseaft essaft sesaft aessft eassft asesft saesft esasft seasft sfesat fsesat sefsat esfsat fessat efssat sfseat fsseat ssfeat ssfeat fsseat sfseat sesfat essfat ssefat ssefat essfat sesfat fessat efssat fsesat sfesat esfsat sefsat afesst faesst aefsst eafsst feasst efasst afsest fasest asfest safest fsaest sfaest aesfst easfst asefst saefst esafst seafst fesast efsast fseast sfeast esfast sefast safets asfets sfaets fsaets afsets fasets saefts asefts seafts esafts aesfts easfts sfeats fseats sefats esfats fesats efsats afests faests aefsts eafsts feasts efasts saftes asftes sfates fsates afstes fastes satfes astfes stafes tsafes atsfes tasfes sftaes fstaes stfaes tsfaes ftsaes tfsaes aftses fatses atfses tafses ftases tfases saetfs asetfs seatfs esatfs aestfs eastfs satefs astefs staefs tsaefs atsefs tasefs setafs estafs steafs tseafs etsafs tesafs aetsfs eatsfs atesfs taesfs etasfs teasfs sfetas fsetas seftas esftas festas efstas sfteas fsteas stfeas tsfeas ftseas tfseas setfas estfas stefas tsefas etsfas tesfas fetsas eftsas ftesas tfesas etfsas tefsas afetss faetss aeftss eaftss featss efatss aftess fatess atfess tafess ftaess tfaess aetfss eatfss atefss taefss etafss teafss fetass eftass fteass tfeass etfass tefass safste asfste sfaste fsaste afsste fasste sasfte assfte ssafte ssafte assfte sasfte sfsate fssate ssfate ssfate fssate sfsate afsste fasste asfste safste fsaste sfaste saftse asftse sfatse fsatse afstse fastse satfse astfse stafse tsafse atsfse tasfse sftase fstase stfase tsfase ftsase tfsase aftsse fatsse atfsse tafsse ftasse tfasse sastfe asstfe ssatfe ssatfe asstfe sastfe satsfe astsfe stasfe tsasfe atssfe tassfe sstafe sstafe stsafe tssafe stsafe tssafe astsfe satsfe atssfe tassfe stasfe tsasfe sfstae fsstae ssftae ssftae fsstae sfstae sftsae fstsae stfsae tsfsae ftssae tfssae sstfae sstfae stsfae tssfae stsfae tssfae fstsae sftsae ftssae tfssae stfsae tsfsae afstse fastse asftse saftse fsatse sfatse aftsse fatsse atfsse tafsse ftasse tfasse astfse satfse atsfse tasfse stafse tsafse fstase sftase ftsase tfsase stfase tsfase saestf asestf seastf esastf aesstf easstf sasetf assetf ssaetf ssaetf assetf sasetf sesatf essatf sseatf sseatf essatf sesatf aesstf easstf asestf saestf esastf seastf saetsf asetsf seatsf esatsf aestsf eastsf satesf astesf staesf tsaesf atsesf tasesf setasf estasf steasf tseasf etsasf tesasf aetssf eatssf atessf taessf etassf teassf sastef asstef ssatef ssatef asstef sastef satsef astsef stasef tsasef atssef tassef sstaef sstaef stsaef tssaef stsaef tssaef astsef satsef atssef tassef stasef tsasef sestaf esstaf ssetaf ssetaf esstaf sestaf setsaf estsaf stesaf tsesaf etssaf tessaf ssteaf ssteaf stseaf tsseaf stseaf tsseaf estsaf setsaf etssaf tessaf stesaf tsesaf aestsf eastsf asetsf saetsf esatsf seatsf aetssf eatssf atessf taessf etassf teassf astesf satesf atsesf tasesf staesf tsaesf estasf setasf etsasf tesasf steasf tseasf sfesta fsesta sefsta esfsta fessta efssta sfseta fsseta ssfeta ssfeta fsseta sfseta sesfta essfta ssefta ssefta essfta sesfta fessta efssta fsesta sfesta esfsta sefsta sfetsa fsetsa seftsa esftsa festsa efstsa sftesa fstesa stfesa tsfesa ftsesa tfsesa setfsa estfsa stefsa tsefsa etsfsa tesfsa fetssa eftssa ftessa tfessa etfssa tefssa sfstea fsstea ssftea ssftea fsstea sfstea sftsea fstsea stfsea tsfsea ftssea tfssea sstfea sstfea stsfea tssfea stsfea tssfea fstsea sftsea ftssea tfssea stfsea tsfsea sestfa esstfa ssetfa ssetfa esstfa sestfa setsfa estsfa stesfa tsesfa etssfa tessfa sstefa sstefa stsefa tssefa stsefa tssefa estsfa setsfa etssfa tessfa stesfa tsesfa festsa efstsa fsetsa sfetsa esftsa seftsa fetssa eftssa ftessa tfessa etfssa tefssa fstesa sftesa ftsesa tfsesa stfesa tsfesa estfsa setfsa etsfsa tesfsa stefsa tsefsa afests faests aefsts eafsts feasts efasts afsets fasets asfets safets fsaets sfaets aesfts easfts asefts saefts esafts seafts fesats efsats fseats sfeats esfats sefats afetss faetss aeftss eaftss featss efatss aftess fatess atfess tafess ftaess tfaess aetfss eatfss atefss taefss etafss teafss fetass eftass fteass tfeass etfass tefass afstes fastes asftes saftes fsates sfates aftses fatses atfses tafses ftases tfases astfes satfes atsfes tasfes stafes tsafes fstaes sftaes ftsaes tfsaes stfaes tsfaes aestfs eastfs asetfs saetfs esatfs seatfs aetsfs eatsfs atesfs taesfs etasfs teasfs astefs satefs atsefs tasefs staefs tsaefs estafs setafs etsafs tesafs steafs tseafs festas efstas fsetas sfetas esftas seftas fetsas eftsas ftesas tfesas etfsas tefsas fsteas sfteas ftseas tfseas stfeas tsfeas estfas setfas etsfas tesfas stefas tsefas
Note: these 'words' (valid or invalid) are all the permutations of the word safest. These words are obtained by scrambling the letters in safest.