Task: Program Execution
Input (English): z, x, a, 1951, p, w, g, 3887, u, y, 4987, 9581, h, i, a, 9159, u, 5037, z, r, 6597, 1443, 4427
Output (English): a, g, h, i, p, r, u, w, x, y, z