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 C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;

namespace ABC085
{
    class Program
    {
        static void Main(string[] args)
        {
            var S = Console.ReadLine();

            Console.WriteLine(A_Already2018.ChangeYear(S));
        }
    }
  
      public class A_Already2018
    {
        public static string ChangeYear(string S)
        {
            var array = S.Split("/");
            var convertedYear = "";
            array[0] = "2018";
            convertedYear = array[0] + "/" + array[1] + "/" + array[2];

            return convertedYear;
        }
    }
}