#!/usr/bin/env python3
n = int(input())
a = abs(25-n)
print('Christmas'+' Eve'*a)

6ffc93dfbb4ee36858d23643f6a95d7b416d2867
<mask token>

<mask token>
print('Christmas' + ' Eve' * a)

n = int(input())
a = abs(25 - n)
print('Christmas' + ' Eve' * a)

#!/usr/bin/env python3
n = int(input())
a = abs(25-n)
print('Christmas'+' Eve'*a)
