Task: Program Execution
Input (English): fHuDcSJnixBdPnFrbLczptwUGnNOusoHpOMI, VxDOILWWnFrbLczptwUGnNGxdSUuqyoK
Output (English): b, c, d, f, g, h, i, j, l, m, n, o, p, r, s, t, u, w, x, z