Task: Program Execution
Input (English): BwkfucBfXzPrYRGvyLQYOeusGlr, vDtEikfucBfXzPrYRGvyTRoVgyiWH
Output (English): b, c, d, e, f, g, h, i, k, o, p, r, t, u, v, w, x, y, z