dtsab tdsab dstab sdtab tsdab stdab dtasb tdasb datsb adtsb tadsb atdsb dsatb sdatb dastb adstb sadtb asdtb tsadb stadb tasdb atsdb satdb astdb dtsba tdsba dstba sdtba tsdba stdba dtbsa tdbsa dbtsa bdtsa tbdsa btdsa dsbta sdbta dbsta bdsta sbdta bsdta tsbda stbda tbsda btsda sbtda bstda dtabs tdabs datbs adtbs tadbs atdbs dtbas tdbas dbtas bdtas tbdas btdas dabts adbts dbats bdats abdts badts tabds atbds tbads btads abtds batds dsabt sdabt dasbt adsbt sadbt asdbt dsbat sdbat dbsat bdsat sbdat bsdat dabst adbst dbast bdast abdst badst sabdt asbdt sbadt bsadt absdt basdt tsabd stabd tasbd atsbd satbd astbd tsbad stbad tbsad btsad sbtad bstad tabsd atbsd tbasd btasd abtsd batsd sabtd asbtd sbatd bsatd abstd bastd
Note: these 'words' (valid or invalid) are all the permutations of the word dtsab. These words are obtained by scrambling the letters in dtsab.