Task: Program Execution
Input (English): 5, F, D, 2, r
Output (English): [['5', 'F', 'D', '2'], ['5', 'F', 'D', 'r'], ['5', 'F', '2', 'r'], ['5', 'D', '2', 'r'], ['F', 'D', '2', 'r']]