softs osfts sfots fsots ofsts fosts sotfs ostfs stofs tsofs otsfs tosfs sftos fstos stfos tsfos ftsos tfsos oftss fotss otfss tofss ftoss tfoss sofst osfst sfost fsost ofsst fosst sosft ossft ssoft ssoft ossft sosft sfsot fssot ssfot ssfot fssot sfsot ofsst fosst osfst sofst fsost sfost sotsf ostsf stosf tsosf otssf tossf sostf osstf ssotf ssotf osstf sostf stsof tssof sstof sstof tssof stsof otssf tossf ostsf sotsf tsosf stosf sftso fstso stfso tsfso ftsso tfsso sfsto fssto ssfto ssfto fssto sfsto stsfo tssfo sstfo sstfo tssfo stsfo ftsso tfsso fstso sftso tsfso stfso oftss fotss otfss tofss ftoss tfoss ofsts fosts osfts softs fsots sfots otsfs tosfs ostfs sotfs tsofs stofs ftsos tfsos fstos sftos tsfos stfos
Note: these 'words' (valid or invalid) are all the permutations of the word softs. These words are obtained by scrambling the letters in softs.