Task: Program Execution
Input (English): tfVyvSSfayTnxCaSqLUaNqRXwwnadzvRY, aOMzdFaCiOEsyTnxCaSqLUaNqkUqkDPtqCeO
Output (English): a, c, d, e, f, i, k, l, m, n, o, p, q, s, t, u, x, y, z