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# (Mono 4.6.2.0) (judge verdict: Runtime Error)

using System;
using System.Collections.Generic;
using System.Linq;

namespace ABC085B
{
    class Program
    {
        static void Main(string[] args)
        {
            var count = int.Parse(Console.ReadLine());
            var d = new List<int>();
            for(int i = 0; i < count; i++)
            {
                d.Add(int.Parse(Console.ReadLine()));
            }
            var sorted = d.OrderBy(v => v).ToArray();

            var result = new List<int>();
            for(int i = 1; i < sorted.Count(); i++)
            {
                if(sorted[i] == sorted[i - 1])
                {
                    continue;
                }

                result.Add(sorted[i]);
            }

            if (!result.Contains(sorted[0]))
            {
                result.Add(sorted[0]);
            }

            Console.WriteLine($"{result.Count()}");
        }
    }
}