Task: Program Execution
Input (English): fXlHBgvvYnBcfoUnZgExUGb, kwzLgrWIFjlHBgvvYnBcfosBOxehAK
Output (English): a, b, c, e, f, g, h, i, j, k, l, n, o, r, s, v, w, x, y, z