Task: Program Execution
Input (English): hFDsTrkxLZUPIeerELi, FiHTGaYGTqvVTosTrkxLZUPIeerEeFwqqLsGyXYH
Output (English): a, e, f, g, h, i, k, l, o, p, q, r, s, t, u, v, w, x, y, z