Task: Program Execution
Input (English): A, 2899, 8667, 8773, f, a, 2255, 9591, 2493, 7265, 5607, K, 4203, G, G, N, O
Output (English): A, f, a, K, G, G, N, O, 2899, 8667, 8773, 2255, 9591, 2493, 7265, 5607, 4203