Task: Program Execution
Input (English): 5511, 4311, f, 8397, b, 6737, 8797, f, 2087, Y, 6891, J, 353, N, I, 3709, 2201, c, 3269, y, 2485, Q
Output (English): f, b, f, Y, J, N, I, c, y, Q