Task: Program Execution
Input (English): HQFLYqRCTjReGXmtmhdqxWkjJbyNVC, rsjuCRXCheGXmtmhdqxWfSC
Output (English): b, c, d, e, f, g, h, j, k, l, m, n, q, r, t, v, w, x, y