Task: Program Execution
Input (English): CbCCRiYoRlzPDIDyPPVLUjWZZqkyHdetZnbDeH, SdTPDIDyPPVLUjWZZqvfAmlQtBv
Output (English): b, c, d, e, h, i, j, k, l, n, o, p, q, r, t, u, v, w, y, z