barbs abrbs brabs rbabs arbbs rabbs babrs abbrs bbars bbars abbrs babrs brbas rbbas bbras bbras rbbas brbas arbbs rabbs abrbs barbs rbabs brabs barsb abrsb brasb rbasb arbsb rabsb basrb absrb bsarb sbarb asbrb sabrb brsab rbsab bsrab sbrab rsbab srbab arsbb rasbb asrbb sarbb rsabb srabb babsr abbsr bbasr bbasr abbsr babsr basbr absbr bsabr sbabr asbbr sabbr bbsar bbsar bsbar sbbar bsbar sbbar absbr basbr asbbr sabbr bsabr sbabr brbsa rbbsa bbrsa bbrsa rbbsa brbsa brsba rbsba bsrba sbrba rsbba srbba bbsra bbsra bsbra sbbra bsbra sbbra rbsba brsba rsbba srbba bsrba sbrba arbsb rabsb abrsb barsb rbasb brasb arsbb rasbb asrbb sarbb rsabb srabb absrb basrb asbrb sabrb bsarb sbarb rbsab brsab rsbab srbab bsrab sbrab
Note: these 'words' (valid or invalid) are all the permutations of the word barbs. These words are obtained by scrambling the letters in barbs.