Task: Program Execution
Input (English): 18, 21, ['Z', 'd', '6117', 'L', 'g', '3891', '7395', '9267', '4721', '875', '1441', 'b', 'O', 'e', '3883', '9805', '9845', 'Q', '8671', 'T', 'c', 'B', 'c', 'q', 'b']
Output (English): c, T, 8671, Q