Task: Program Execution
Input (English): BYBAWWULQZHwJCNlSObrSMiDlFzyHxG, UoyACoFBGlelHwJCNlSObrSMDjd
Output (English): a, b, c, d, f, g, h, i, j, l, m, n, o, q, r, s, u, w, x, y, z