output_description: Print the specified string (case-sensitive).
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      D
attempt: a, b = map(int, input().split())
  c = []
  for i in range(a):
      c.append(int(input()))
  c = sorted(c)
  # print(c)
  f = []
  for k in range(a - b + 1):
      e = []
      f.append(e)
      for i in range(b):
          e.append(c[i + k])
  # print(f)
  g = []
  for i in range(len(f)):
      g.append(max(f[i]) - min(f[i]))
  print(min(g))
  
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."}]