Task: Program Execution
Input (English): OrXTRqpNDIVuMcCjxFDwUCTQzEHwdklljvZ, DnVuMcCjxFDwUCTSbtLBlQhSALRD
Output (English): c, d, e, f, h, i, j, k, l, m, n, o, p, q, r, t, u, v, w, x, z