Task: Program Execution
Input (English): X, 1, F, U, P
Output (English): [['X', '1', 'F', 'U'], ['X', '1', 'F', 'P'], ['X', '1', 'U', 'P'], ['X', 'F', 'U', 'P'], ['1', 'F', 'U', 'P']]