row = input()
row = row.split(' ')
nums = [int(n) for n in row]
nums2 = list(range(nums[0]-1,0,-1))
nums1 = nums[1:]
nums1 = [abs(nums1[i] - nums1[i+1]) for i in range(0,len(nums1) - 1)]
if nums1 == nums2:
    print('Jolly')
else:
    print('Not jolly')