Task: Program Execution
Input (English): 21, ['N', 'Y', 'f', '5587', 'a', '2353', 'x', '8017', '9719', '3045', '4499', '9499', 'r', 'I', 'S', '2531', '9799', '43', 'G', '9863', 'Z', 'F', '5773', 'D', '9541', 'T', 'C', '8635', '3651', 't', 'I', '2597', 'j', 'J', 'p', 'o', 'j', 'Q', '6141', '6525', 'R', '9255', '9141', '5037', 'i', '3317', 'Q']
Output (English): N, F, 9141