Task: Program Execution
Input (English): 815, 159, 699, 2637, L, 4989, K, 8151, 7049, b, 261, 3047, J, X, 4889, Y, 4355, 9609, U, J, A, U, n, 8629
Output (English): L, K, b, J, X, Y, U, J, A, U, n