Task: Program Execution
Input (English): MFqUvXvWBATKyivcKciioOuUCesEwPR, NVnxfdEKehSZxTKyivcKciioOuTaykzCvOuqsr
Output (English): a, c, d, e, f, h, i, k, n, o, q, r, s, t, u, v, x, y, z