Task: Program Execution
Input (English): a, 2741, u, x, i, B, J, 189, 289, C, I, 1021, u, 1469, D, G, 5145, 5369, m, 3103, 63, 2123
Output (English): 2741, 189, 289, 1021, 1469, 5145, 5369, 3103, 63, 2123