Task: Program Execution
Input (English): 7547, 27, x, d, J, 6173, 4343, 1773, 3259, N, z, 3621, R, O, n, 1807, 2877, I, 3439, 1825, x, f, 1899, Y
Output (English): x, d, J, N, z, R, O, n, I, x, f, Y