robot orbot rboot broot obrot borot roobt orobt roobt orobt oorbt oorbt rboot broot robot orbot borot obrot obort boort oobrt oobrt boort obort robto orbto rboto broto obrto borto rotbo ortbo rtobo trobo otrbo torbo rbtoo brtoo rtboo trboo btroo tbroo obtro botro otbro tobro btoro tboro rootb orotb rootb orotb oortb oortb rotob ortob rtoob troob otrob torob rotob ortob rtoob troob otrob torob ootrb ootrb otorb toorb otorb toorb rboto broto robto orbto borto obrto rbtoo brtoo rtboo trboo btroo tbroo rotbo ortbo rtobo trobo otrbo torbo botro obtro btoro tboro otbro tobro obotr bootr oobtr oobtr bootr obotr obtor botor otbor tobor btoor tboor ootbr ootbr otobr toobr otobr toobr botor obtor btoor tboor otbor tobor
Note: these 'words' (valid or invalid) are all the permutations of the word robot. These words are obtained by scrambling the letters in robot.