output_description: Print the string putting a single space between the first 4 letters and last 8
  letters in the string s. Put a line break at the end.
  
  * * *
input_description: The input is given from Standard Input in the following format:
  
      
      
      s
attempt: import math
  import sys
  
  
  def getinputdata():
  
      # 配列初期化
      array_result = []
  
      data = input()
  
      array_result.append(data.split(" "))
  
      flg = 1
  
      try:
  
          while flg:
  
              data = input()
  
              array_temp = []
  
              if data != "":
  
                  array_result.append(data.split(" "))
  
                  flg = 1
  
              else:
  
                  flg = 0
      finally:
  
          return array_result
  
  
  arr_data = getinputdata()
  
  s = arr_data[0][0]
  
  print(s[0:4] + " " + s[4:])
  
problem_description: Statement
  
  This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it
  `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
  
  So he has decided to make a program that puts the single space he omitted.
  
  You are given a string s with 12 letters. Output the string putting a single
  space between the first 4 letters and last 8 letters in the string s.
samples: [{"input": "CODEFESTIVAL", "output": "CODE FESTIVAL\n    \n\nPutting a single space between the first 4 letters and last 8 letters in\n`CODEFESTIVAL` makes it `CODE FESTIVAL`.\n\n* * *"}, {"input": "POSTGRADUATE", "output": "POST GRADUATE\n    \n\n* * *"}, {"input": "ABCDEFGHIJKL", "output": "ABCD EFGHIJKL"}]