Task: Program Execution
Input (English): 1, U, 3, o, H, 2, 9
Output (English): [['1', 'U', '3', 'o', 'H', '2'], ['1', 'U', '3', 'o', 'H', '9'], ['1', 'U', '3', 'o', '2', '9'], ['1', 'U', '3', 'H', '2', '9'], ['1', 'U', 'o', 'H', '2', '9'], ['1', '3', 'o', 'H', '2', '9'], ['U', '3', 'o', 'H', '2', '9']]