Task: Program Execution
Input (English): 7431, B, 2057, x, 6183, C, U, q, y, 227, N, 4905, 7131, 9685, 987, r, n, 7029, W, 3085
Output (English): 7431, 2057, 6183, 227, 4905, 7131, 9685, 987, 7029, 3085