Task: Program Execution
Input (English): 15, 17, ['k', '5327', '7333', 'W', 'T', '4525', '8555', 'p', '2163', '51', '257', 'V', '9307', '3767', 'U', 'a', '9439', 'Z', '3543', 'f', 'X']
Output (English): 9439, a, U