Task: Program Execution
Input (English): 4, ['J', 'O', 't', 'H', '353', '7963', 'U', '2737', 'r', 'E', '5649', 'i', '8671', 'S', '335', 'B', '9949', '5811', 'K', '4983']
Output (English): J, O, t, H