faros afros fraos rfaos arfos rafos faors afors foars ofars aofrs oafrs froas rfoas foras ofras rofas orfas arofs raofs aorfs oarfs roafs orafs farso afrso fraso rfaso arfso rafso fasro afsro fsaro sfaro asfro safro frsao rfsao fsrao sfrao rsfao srfao arsfo rasfo asrfo sarfo rsafo srafo faosr afosr foasr ofasr aofsr oafsr fasor afsor fsaor sfaor asfor safor fosar ofsar fsoar sfoar osfar sofar aosfr oasfr asofr saofr osafr soafr frosa rfosa forsa ofrsa rofsa orfsa frsoa rfsoa fsroa sfroa rsfoa srfoa fosra ofsra fsora sfora osfra sofra rosfa orsfa rsofa srofa osrfa sorfa arosf raosf aorsf oarsf roasf orasf arsof rasof asrof sarof rsaof sraof aosrf oasrf asorf saorf osarf soarf rosaf orsaf rsoaf sroaf osraf soraf
Note: these 'words' (valid or invalid) are all the permutations of the word faros. These words are obtained by scrambling the letters in faros.