Task: Program Execution
Input (English): 20, ['N', '7471', 'Y', '1397', '8693', '3615', '6169', '9865', '8921', 'Y', '3093', '9535', 'J', '8665', 'E', 'n', 'E', 'N', '9081', 'c', 'U', '6001', 'd', '5491', 'O', 'K', '9587', 'I', 'w', 'W', '4617', '5219', '4947', 'H', '3809', '155', 'P', 'T', 'D', 'B', '5183']
Output (English): N, U, 5183