Task: Program Execution
Input (English): 11, ['2479', 'j', '8251', '3143', '8977', '3155', '2889', '8857', 'a', '7985', 'P', '8219', '785', 'Z', 'Q', 'U', 'i', '6227', '2979', '3819', '6845', '499', 'x', '71', '31', '3975', 'S', '1727', 'l', 'H', '4261', '9713', '7067', 'X']
Output (English): 2479, 8219, x, X