Problem:
Score : 100 points

Problem 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.

Constraints

S is a string of length 10.

The first eight characters in S are 2017/01/.

The last two characters in S are digits and represent an integer between 1 and 31 (inclusive).

Input

Input is given from Standard Input in the following format:

S

Output

Replace the first four characters in S with 2018 and print it.

Sample Input 1

2017/01/07

Sample Output 1

2018/01/07

Sample Input 2

2017/01/31

Sample Output 2

2018/01/31

Solution in Scala (2.11.7) (judge verdict: Accepted)

object Main extends App {
  import scala.util.matching.Regex

  val keyValPattern: Regex = "([0-9]+)/([0-9]+)/([0-9]+)".r

  val input: String = readLine


  val patternMatch = keyValPattern.findFirstMatchIn(input)
  patternMatch match {
    case Some(m) => println(s"2018/${m.group(2)}/${m.group(3)}")
    case _ => println("error")
  }
}