Task: Program Execution
Input (English): yOwfTYcoljHvjPdWoQEiTfRjjpzZXS, zyqOPrPYlGvjPdWoQEiTfZWc
Output (English): c, d, e, f, h, i, j, l, o, p, q, r, s, t, v, w, x, y, z