Task: Program Execution
Input (English): aFMKXpsMSYMGQdUexPnPzilkruJojRfPQBaf, GuwbFMGQdUexPnPzilkgnuK
Output (English): a, b, d, e, f, g, i, j, k, l, m, n, o, p, q, r, s, u, x, y, z