Task: Program Execution
Input (English): WXAwhPHYIaLwnnSuxWFnxXTVWoEVDCrR, xQJZSYYSZuZRHYIaLwnnSuxWFnetsCPYmgNgl
Output (English): a, c, e, f, g, h, i, j, l, m, n, p, q, r, s, t, u, w, x, y, z