Task: Program Execution
Input (English): kqaqReJwRrfZTmoamtUOdAPlEyIHcX, bNMuGaZLWGTmoamtUOdAPlEysWfNc
Output (English): a, c, d, e, f, h, i, j, k, l, m, o, p, q, r, t, u, w, x, y, z