Task: Program Execution
Input (English): 10, ['a', '6937', 'x', '5747', '5279', '8937', 'x', 'O', 'i', 'U', 'q', '5173', 'T', '8167', 'b', '5413', '225', '425', '7615', '8213', 's', '9543', 'r', 'e', 'c']
Output (English): a, q, s