Task: Program Execution
Input (English): 9, 10, ['J', '7949', 'b', '1213', 'd', 'k', '9641', '7061', 'F', 'R', 'z', 'm', '1107', '2427', 'n', 'm', 'f', 'E', '111', '6067', '2737', '875', '1743', 'j', '4563', '9525']
Output (English): FR