output_description: Print the specified string (case-sensitive).
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      D
attempt: import sys
  
  sys.setrecursionlimit(1 << 25)
  read = sys.stdin.readline
  ra = range
  enu = enumerate
  
  
  def exit(*argv, **kwarg):
      print(*argv, **kwarg)
      sys.exit()
  
  
  def mina(*argv, sub=1):
      return list(map(lambda x: x - sub, argv))
  
  
  # 受け渡されたすべての要素からsubだけ引く.リストを*をつけて展開しておくこと
  
  
  def a_int():
      return int(read())
  
  
  def ints():
      return list(map(int, read().split()))
  
  
  def read_col(H):
      """H is number of rows
      A列、B列が与えられるようなとき
      ex1)A,B=read_col(H)    ex2) A,=read_col(H) #一列の場合"""
      ret = []
      for _ in range(H):
          ret.append(list(map(int, read().split())))
      return tuple(map(list, zip(*ret)))
  
  
  def read_tuple(H):
      """H is number of rows"""
      ret = []
      for _ in range(H):
          ret.append(tuple(map(int, read().split())))
      return ret
  
  
  def read_matrix(H):
      """H is number of rows"""
      ret = []
      for _ in range(H):
          ret.append(list(map(int, read().split())))
      return ret
      # return [list(map(int, read().split())) for _ in range(H)] # 内包表記はpypyでは遅いため
  
  
  MOD = 10**9 + 7
  INF = 2**31  # 2147483648 > 10**9
  # default import
  from collections import defaultdict, Counter, deque
  from operator import itemgetter, xor, add
  from itertools import product, permutations, combinations
  from bisect import bisect_left, bisect_right  # , insort_left, insort_right
  from functools import reduce
  from math import gcd
  
  
  def lcm(a, b):
      # 最小公倍数
      g = gcd(a, b)
      return a // g * b
  
  
  # https://atcoder.jp/contests/abc115/tasks/abc115_a
  
  
  print(
      ["Christmas", "Christmas Eve", "Christmas Eve Eve", "Christmas Eve Eve Eve"][
          [25, 24, 23, 22].index(a_int())
      ]
  )
  
problem_description: Statement
  
  In some other world, today is December D-th.
  
  Write a program that prints `Christmas` if D = 25, `Christmas Eve` if D = 24,
  `Christmas Eve Eve` if D = 23 and `Christmas Eve Eve Eve` if D = 22.
samples: [{"input": "25", "output": "Christmas\n    \n\n* * *"}, {"input": "22", "output": "Christmas Eve Eve Eve\n    \n\nBe sure to print spaces between the words."}]