Task: Program Execution
Input (English): 2, 15, ['3147', 'E', 'r', 'C', 'D', 'z', '9611', 'x', 'Y', '6009', '357', 'D', 'c', '5487', 'u', '2963']
Output (English): ErCDz9611xY6009357Dc5487u