astof satof atsof tasof staof tsaof asotf saotf aostf oastf soatf osatf atosf taosf aotsf oatsf toasf otasf stoaf tsoaf sotaf ostaf tosaf otsaf astfo satfo atsfo tasfo stafo tsafo asfto safto afsto fasto sfato fsato atfso tafso aftso fatso tfaso ftaso stfao tsfao sftao fstao tfsao ftsao asoft saoft aosft oasft soaft osaft asfot safot afsot fasot sfaot fsaot aofst oafst afost faost ofast foast sofat osfat sfoat fsoat ofsat fosat atofs taofs aotfs oatfs toafs otafs atfos tafos aftos fatos tfaos ftaos aofts oafts afots faots ofats foats tofas otfas tfoas ftoas oftas fotas stofa tsofa sotfa ostfa tosfa otsfa stfoa tsfoa sftoa fstoa tfsoa ftsoa softa osfta sfota fsota ofsta fosta tofsa otfsa tfosa ftosa oftsa fotsa
Note: these 'words' (valid or invalid) are all the permutations of the word astof. These words are obtained by scrambling the letters in astof.