Task: Program Execution
Input (English): qvwUfxIKDBUoSnuXJutexDQauqeI, oGWdJNRtScQnkxwfxIKDBUoSnuXJutirXzzomBDRXtyiN
Output (English): b, c, d, f, g, i, j, k, m, n, o, q, r, s, t, u, w, x, y, z