Task: Program Execution
Input (English): 4, 6, ['s', '3727', 'y', 'U', '2467', 'j', 'j', '603', 'F', 'Y', 'M', 'y', '1475', 'J', 'U', 'A', 's', 'U', '1363', '959', '2531']
Output (English): U, Y, A