Task: Program Execution
Input (English): xMTPrheYUmnYnaiowPIhpJazTGxIyJzrTCP, BqQYkPbQheYUmnYnaiowPIhCCnnxjecawZYHm
Output (English): a, b, c, e, h, i, j, k, m, n, o, p, q, u, w, x, y, z