Task: Program Execution
Input (English): 4157, f, y, X, 8745, N, e, 3573, K, J, a, 5837, 6903, 3129, 3623, N, X, n, O, 2457, r, 4519
Output (English): 4157, 8745, 3573, 5837, 6903, 3129, 3623, 2457, 4519