Task: Program Execution
Input (English): DRpkxvHXzwowWVNvmYsjuwQUYOFjw, eXIHxvHXzwowWVNvmYFTonSAIMG
Output (English): d, f, h, j, k, m, n, o, p, q, r, s, u, v, w, x, y, z