Task: Program Execution
Input (English): 2827, y, l, 927, 7561, l, 3467, y, g, 6827, e, w, o, 4029, e, i, t, 1339, 2793, 2313, z, r, r, q
Output (English): e, g, i, l, o, q, r, t, w, y, z