Task: Program Execution
Input (English): wGLxCglsKfqOqizpIKUttfGUcrgVSYRbTdIxPlx, ySrjFzpIKUttfGUcrgVaGaaPDjb
Output (English): b, c, d, f, g, i, k, l, o, p, q, r, s, t, u, v, w, x, y, z