def min_judge(lis: list): flag = True for i in range(len(lis) - 1): if lis[i] > lis[i + 1]: flag = False break return flag def max_judge(lis: list): flag = True for i in range(len(lis) - 1): if lis[i] < lis[i + 1]: flag = False break return flag while True: try: num = input() nums = list(map(int, input().split())) print('sorted' if min_judge(nums) or max_judge(nums) else 'unsorted') except: break