Task: Program Execution
Input (English): v, c, 1375, d, h, 2023, b, 2469, 225, 7731, 757, c, m, 7543, u, 9541, w, 5701, 9121, 3505, 909, f, 617
Output (English): b, c, d, f, h, m, u, v, w