Task: Program Execution
Input (English): 1, 2, ['5491', 'x', 'A', 'Y', '9907', 'a', 'B', 'X', '6171', 's', 'c', 'F', '237', '379', 'n', '361', 'X', '6887', '4497', 'l', '3565', '4533', 'I', 'c', 't', 'u']
Output (English): 5491, A, 9907, B, 6171, c, 237, n, X, 4497, 3565, I, t