Task: Program Execution
Input (English): 9, 13, ['7865', 'F', 'u', 'y', '4357', '171', 'R', 'Q', 'U', 'L', '8059', 'Y', '4367', '5605', 'y', '4387', '1919', 'H', '2747', '6687']
Output (English): 7634Y9508LU