Task: Program Execution
Input (English): QODRsctsnbRqiKKADpcjMwNYdjHzcCQybFnyG, tKLhpsgTKiKKADpcjMwNYdjHXToMBqtbVRsA
Output (English): a, b, c, d, f, g, h, i, j, k, m, n, o, p, q, r, s, t, w, y, z