Task: Program Execution
Input (English): F, 6173, N, 7233, 7181, W, 471, 8029, u, 9137, 2663, H, 8689, a, 2771, z, 8645
Output (English): 6173, 7233, 7181, 471, 8029, 9137, 2663, 8689, 2771, 8645