Task: Program Execution
Input (English): iZvDzIzXAiToBrnukjSEGUlhTxBETHwQq, CQeoBrnukjSEGUlhTxAbr
Output (English): a, b, d, e, g, h, i, j, k, l, n, o, q, r, s, t, u, v, w, x, z