Task: Program Execution
Input (English): 4577 8825 1577 d 7963 p 6147 v 8619 u 3193 8783 8505 5591 f n 7881 8025 8879 h 3175 u q 253 a j 7785 j q 2887 b 1319 c 1961 g i
Output (English): a, b, c, d, f, g, h, i, j, n, p, q, u, v