Task: Program Execution
Input (English): 6709, 1993, Z, y, 3941, b, 9115, X, 1343, J, 1311, I, 6121, M, f
Output (English): Z, y, b, X, J, I, M, f, 6709, 1993, 3941, 9115, 1343, 1311, 6121