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