D = int(eval(input()))

if D==25:

    print("Christmas")

elif D==24:

    print("Christmas Eve")

elif D==23:

    print("Christmas Eve Eve")

else:

    print("Christmas Eve Eve Eve")
D = int(input())

print('Christmas', end='')

for _ in range(25-D):

	print(' Eve', end='')

print()

D = int(eval(input()))
if D == 25:
    print("Christmas")
elif D == 24:
    print("Christmas Eve")
elif D == 23:
    print("Christmas Eve Eve")
else:
    print("Christmas Eve Eve Eve")

D = int(input())
print("Christmas", end="")
for _ in range(25 - D):
    print(" Eve", end="")
print()

-D = int(eval(input())) -if D == 25: -    print("Christmas") -elif D == 24: -    print("Christmas Eve") -elif D == 23: -    print("Christmas Eve Eve") -else: -    print("Christmas Eve Eve Eve") +D = int(input()) +print("Christmas", end="") +for _ in range(25 - D): +    print(" Eve", end="") +print()