brsob rbsob bsrob sbrob rsbob srbob brosb rbosb borsb obrsb robsb orbsb bsorb sborb bosrb obsrb sobrb osbrb rsobb srobb rosbb orsbb sorbb osrbb brsbo rbsbo bsrbo sbrbo rsbbo srbbo brbso rbbso bbrso bbrso rbbso brbso bsbro sbbro bbsro bbsro sbbro bsbro rsbbo srbbo rbsbo brsbo sbrbo bsrbo brobs rbobs borbs obrbs robbs orbbs brbos rbbos bbros bbros rbbos brbos bobrs obbrs bbors bbors obbrs bobrs robbs orbbs rbobs brobs obrbs borbs bsobr sbobr bosbr obsbr sobbr osbbr bsbor sbbor bbsor bbsor sbbor bsbor bobsr obbsr bbosr bbosr obbsr bobsr sobbr osbbr sbobr bsobr obsbr bosbr rsobb srobb rosbb orsbb sorbb osrbb rsbob srbob rbsob brsob sbrob bsrob robsb orbsb rbosb brosb obrsb borsb sobrb osbrb sborb bsorb obsrb bosrb
Note: these 'words' (valid or invalid) are all the permutations of the word brsob. These words are obtained by scrambling the letters in brsob.