Task: Program Execution
Input (English): 3969, I, t, 3489, 8737, U, C, 7493, R, J, R, 4245, 7107, 1705, 3415, c, 4623, v, y, 7513, 5943, 9637
Output (English): 3969, 3489, 8737, 7493, 4245, 7107, 1705, 3415, 4623, 7513, 5943, 9637