Task: Program Execution
Input (English): C, 9709, E, 515, 1015, 4285, X, 3577, P, x, 1751, u, 3011, g, 1871, 8607, u
Output (English): 9709, 515, 1015, 4285, 3577, 1751, 3011, 1871, 8607