def is_jolly(nums):
n=nums[0]
differences=set()
for i in range(1,n):
difference=abs(nums[i]-nums[i-1])
if 1<=difference<=n-1:
differences.add(difference)
else:
return False
return len(differences)
nums=list(map(int,input().split(' ')))
if is_jolly(nums):
print('Jolly')
else:
print('Not jolly')
