output_description: Replace the first four characters in S with `2018` and print it.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      S
attempt: l = list(input())
  print('2018'+l.[4:])
  
problem_description: Statement
  
  On some day in January 2018, Takaki is writing a document. The document has a
  column where the current date is written in `yyyy/mm/dd` format. For example,
  January 23, 2018 should be written as `2018/01/23`.
  
  After finishing the document, she noticed that she had mistakenly wrote `2017`
  at the beginning of the date column. Write a program that, when the string
  that Takaki wrote in the date column, S, is given as input, modifies the first
  four characters in S to `2018` and prints it.
samples: [{"input": "2017/01/07", "output": "2018/01/07\n    \n\n* * *"}, {"input": "2017/01/31", "output": "2018/01/31"}]