Task: Program Execution
Input (English): yKjCFudtXYOgHHCWuBAkdtzQiIjCXnjGQW, CbAbtXYOgHHCWuBAkdttzyLRzf
Output (English): a, b, c, d, f, g, h, i, j, k, n, o, q, t, u, w, x, y, z