Task: Program Execution
Input (English): xDGUsmvZIFvgFjIfBjcHhgnuzrQJl, oyFiEKovgFjIfBjcHhgnuzREjPYflQCrWhH
Output (English): b, c, e, f, g, h, i, j, k, l, n, o, p, q, r, u, v, w, y, z