Task: Program Execution
Input (English): bgpqccCLkuQBWMarjtOXTJOAz, KcWlPHIxLuQBWMarjtOeznjpWxftC
Output (English): a, b, c, e, f, h, i, j, k, l, m, n, o, p, q, r, t, u, w, x, z