Task: Program Execution
Input (English): 20, 20, ['8951', '5979', '1753', '569', 'Z', '3139', 's', 'j', 'l', '4507', 'Z', '7443', 'p', 'd', 'e', 'p', '2355', '243', '8245', 'K', '1549', '1871', '7221', '4197', 'u', 'V']
Output (English): K