Task: Program Execution
Input (English): NnIMZzEKrMXMWUCySCZqcFXJZdZunnR, IDZkoFSjtqKrMXMWUCySCZqaUTfN
Output (English): c, d, e, f, i, j, k, m, n, q, r, s, u, w, x, y, z