Task: Program Execution
Input (English): LVlqUaDxaXKJfoqEEDxTXFz, OiThLaErVXSeDxaXKJfoqEEDWfPJkz
Output (English): a, d, e, f, h, i, j, k, l, o, p, q, r, s, t, v, w, x, z