Task: Program Execution
Input (English): 9, 17, ['1391', '4577', '493', '7987', 'a', 'W', '5015', '7151', 'r', '1031', 'b', 'Y', 'h', 'N', 'U', 'v', 'o', '8417']
Output (English): o, v, U, N, h, Y, b, 1031, r