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;
using System.Text;
using System.Threading.Tasks;

namespace ABC85_3
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] s = Console.ReadLine().Split(' ');
            int N = int.Parse(s[0]);
            int Y = int.Parse(s[1]);
            bool Out = false;
            for (int i = 0; i <= N; i++)
            {
                for (int j = 0; j <= N; j++)
                {
                    for (int k = 0; k <= N-i-j; k++)
                    {
                        if (i * 10000 + j * 5000 + k * 1000 == Y)
                        {
                            Console.WriteLine(i + " " + j + " " + k);
                            Out = true;
                            break;
                        }
                    }
                    if (Out)
                    {
                        break;
                    }
                }
                if (Out)
                {
                    break;
                }
            }
            if (!Out)
            {
                Console.WriteLine(-1 + " " + -1 + " " + -1);
            }

        }
    }
}