Task: Program Execution
Input (English): 13, 13, ['X', 'L', '8787', 'b', '2899', '1375', '4347', 'f', '9399', 'V', '291', '5905', 'U', '6565', 'P', 'Y', 'v', '6299', 'V', '3017', '5823', 'A', '7985']
Output (English): U