Task: Program Execution
Input (English): MdMYEYbGanejpaWQIufqZJyHAWKLmWGvFoGrk, cmWQmuDyuBejpaWQIufqZJyHNXPHZjcq
Output (English): a, b, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, u, v, w, y, z