Task: Program Execution
Input (English): f, 9337, X, 7613, 6887, W, 5771, o, 9183, 4133, N, E, r, 4691, 2141, 2423, C
Output (English): 9337, 7613, 6887, 5771, 9183, 4133, 4691, 2141, 2423