Task: Program Execution
Input (English): YqlFZoXGAUmrGgFNHrCXmEExEMHmafB, QQcBGgFNHrCXmEExEMSOUbfxOnCLel
Output (English): a, b, c, e, f, g, h, l, m, n, o, q, r, u, x, y, z