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: print("No")
  
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"}]