Task: Program Execution
Input (English): 8, c, C, a, i, U
Output (English): [['8', 'c', 'C', 'a', 'i'], ['8', 'c', 'C', 'a', 'U'], ['8', 'c', 'C', 'i', 'U'], ['8', 'c', 'a', 'i', 'U'], ['8', 'C', 'a', 'i', 'U'], ['c', 'C', 'a', 'i', 'U']]