Task: Program Execution
Input (English): W, 7119, y, 9947, 923, P, 4153, 2027, 4323, G, X, W, K, A, l, 4745, r, 1731, 7751, h, u
Output (English): 7119, 9947, 923, 4153, 2027, 4323, 4745, 1731, 7751