Task: Program Execution
Input (English): 5, 9, ['u', '1879', 'y', '4419', 'c', 'y', 'U', 'B', 'u', '6661', '7997', '165', '5487', '9527', '9873', '3325', '4759', 'C', '1589', '3025', '2133', '3389', 'y', '421', 's']
Output (English): uBUyc