Task: Program Execution
Input (English): O, U, m, 9, K, a, 3
Output (English): [['O', 'U', 'm', '9', 'K', 'a'], ['O', 'U', 'm', '9', 'K', '3'], ['O', 'U', 'm', '9', 'a', '3'], ['O', 'U', 'm', 'K', 'a', '3'], ['O', 'U', '9', 'K', 'a', '3'], ['O', 'm', '9', 'K', 'a', '3'], ['U', 'm', '9', 'K', 'a', '3']]