safed asfed sfaed fsaed afsed fased saefd asefd seafd esafd aesfd easfd sfead fsead sefad esfad fesad efsad afesd faesd aefsd eafsd feasd efasd safde asfde sfade fsade afsde fasde sadfe asdfe sdafe dsafe adsfe dasfe sfdae fsdae sdfae dsfae fdsae dfsae afdse fadse adfse dafse fdase dfase saedf asedf seadf esadf aesdf easdf sadef asdef sdaef dsaef adsef dasef sedaf esdaf sdeaf dseaf edsaf desaf aedsf eadsf adesf daesf edasf deasf sfeda fseda sefda esfda fesda efsda sfdea fsdea sdfea dsfea fdsea dfsea sedfa esdfa sdefa dsefa edsfa desfa fedsa efdsa fdesa dfesa edfsa defsa afeds faeds aefds eafds feads efads afdes fades adfes dafes fdaes dfaes aedfs eadfs adefs daefs edafs deafs fedas efdas fdeas dfeas edfas defas
Note: these 'words' (valid or invalid) are all the permutations of the word safed. These words are obtained by scrambling the letters in safed.