Task: Program Execution
Input (English): vpgcNgoNIbOqTugsIxjUYWrdlNPOUVLXTorND, PByTfRkpbOqTugsIxjUYWrGVx
Output (English): b, c, d, g, i, j, l, n, o, p, q, r, s, t, u, v, w, x, y