Task: Program Execution
Input (English): 9, ['v', '2181', 'x', 'T', '4511', '1515', '6571', 'O', '4867', 'i', '4383', 'x', 'j', '9043', '9497', '1291', '9509', '8917', 'Q', '1309', 's', 'Z', '177', 'Z', 'q', '9533', 'C', 'X', 'B', 'u', 'B', '5703', 'F', 'N', 'P']
Output (English): v, i, Q, X