Task: Program Execution
Input (English): 1, 5, ['M', 'K', '6653', '503', '9279', 'R', '7451', 'F', '9989', 'L', 'y', 'U', '3581', '4733', '2645', '3581', '5077', '1921', 'X']
Output (English): M, R, y, 3581