ibeac bieac iebac eibac beiac ebiac ibaec biaec iabec aibec baiec abiec ieabc eiabc iaebc aiebc eaibc aeibc beaic ebaic baeic abeic eabic aebic ibeca bieca iebca eibca beica ebica ibcea bicea icbea cibea bciea cbiea iecba eicba iceba cieba eciba ceiba becia ebcia bceia cbeia ecbia cebia ibace biace iabce aibce baice abice ibcae bicae icbae cibae bciae cbiae iacbe aicbe icabe ciabe acibe caibe bacie abcie bcaie cbaie acbie cabie ieacb eiacb iaecb aiecb eaicb aeicb iecab eicab iceab cieab eciab ceiab iaceb aiceb icaeb ciaeb acieb caieb eacib aecib ecaib ceaib aceib caeib beaci ebaci baeci abeci eabci aebci becai ebcai bceai cbeai ecbai cebai bacei abcei bcaei cbaei acbei cabei eacbi aecbi ecabi ceabi acebi caebi
Note: these 'words' (valid or invalid) are all the permutations of the word ibeac. These words are obtained by scrambling the letters in ibeac.