Task: Program Execution
Input (English): WKXoIrhIcfpaPGFPUCtMZsZhSniaWFkf, BGIcfpaPGFPUCtMZsLtOlvqyFWbFO
Output (English): a, c, f, g, h, i, k, m, n, o, p, r, s, t, u, w, x, z