while True:
try:
L = list(map(int,input().split()))
except:
break
n,L = L[0],L[1:]
s = set()
if n ==1:
print("Jolly")
continue
for i in range(n-1):
k = abs(L[i]-L[i+1])
if 1<=k<=n-1:
s.add(k)
if len(s) == n-1:
print("Jolly")
else:
print("Not jolly")