Task: Program Execution
Input (English): qbbzDBXfxNxLOuyFZazJrVUKxvPAKtSTNfVnn, eMxLOuyFZazJrVUKDlfw
Output (English): a, b, d, f, j, k, l, n, o, p, q, r, s, t, u, v, x, y, z