D = int(eval(input()))

if D == 25:

    print('Christmas')

elif D == 24:

    print('Christmas Eve')

elif D == 23:

    print('Christmas Eve Eve')

elif D == 22:

    print('Christmas Eve Eve Eve')
D = int(eval(input()))

_ans = ['Christmas']

for _ in range(25 - D):

    _ans.append('Eve')

ans = ' '.join(_ans)

print(ans)
D = int(eval(input()))
if D == 25:
    print("Christmas")
elif D == 24:
    print("Christmas Eve")
elif D == 23:
    print("Christmas Eve Eve")
elif D == 22:
    print("Christmas Eve Eve Eve")

D = int(eval(input()))
_ans = ["Christmas"]
for _ in range(25 - D):
    _ans.append("Eve")
ans = " ".join(_ans)
print(ans)

-if D == 25: -    print("Christmas") -elif D == 24: -    print("Christmas Eve") -elif D == 23: -    print("Christmas Eve Eve") -elif D == 22: -    print("Christmas Eve Eve Eve") +_ans = ["Christmas"] +for _ in range(25 - D): +    _ans.append("Eve") +ans = " ".join(_ans) +print(ans)