rolob orlob rloob lroob olrob lorob roolb orolb roolb orolb oorlb oorlb rloob lroob rolob orlob lorob olrob olorb loorb oolrb oolrb loorb olorb rolbo orlbo rlobo lrobo olrbo lorbo roblo orblo rbolo brolo obrlo borlo rlboo lrboo rbloo brloo lbroo blroo olbro lobro oblro bolro lboro bloro roobl orobl roobl orobl oorbl oorbl robol orbol rbool brool obrol borol robol orbol rbool brool obrol borol oobrl oobrl oborl boorl oborl boorl rlobo lrobo rolbo orlbo lorbo olrbo rlboo lrboo rbloo brloo lbroo blroo roblo orblo rbolo brolo obrlo borlo lobro olbro lboro bloro oblro bolro olobr loobr oolbr oolbr loobr olobr olbor lobor oblor bolor lboor bloor ooblr ooblr obolr boolr obolr boolr lobor olbor lboor bloor oblor bolor
Note: these 'words' (valid or invalid) are all the permutations of the word rolob. These words are obtained by scrambling the letters in rolob.