Task: Program Execution
Input (English): YGGcCmvbDJnlUuGBOttWFkUorvHp, kpEvxCffbDJnlUuGBOttYyyCcYUCz
Output (English): b, c, d, e, f, g, j, k, l, n, o, p, t, u, v, x, y, z