Task: Program Execution
Input (English): 7697, u, 8411, e, 6701, t, 6901, f, 9771, q, N, K, z, 109, G, 2831, c, 415, 1407, 3987, 3445, 2957, 2647, N
Output (English): 7697, 8411, 6701, 6901, 9771, 109, 2831, 415, 1407, 3987, 3445, 2957, 2647