d = []
while True:
n = int(input(">>>"))
if n == -1 :break
d.append(n)
for i in d:
if i == 1 or i == 2 :
print("even")
continue
a = [1, 1]
for _ in range(i - 2):
a.append(a[0+_] + a[1+_])
if a[-1] % 2 == 0 :
print("odd")
else:
print("even")