Task: Program Execution
Input (English): E, f, 1637, h, 1321, h, 2427, 2361, 7565, 7231, 7615, 4099, 4813, 5399, 6705, e, 4149, X, n, u, w
Output (English): 3, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17