using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        int number = 1090;

        string numString = number.ToString();

        StringBuilder sb =  new StringBuilder();

        foreach(char c in numString)

        {

            if(c == '0') {

                sb.Append("5");

                continue;

            }

            sb.Append(c);

        }

        Console.WriteLine(sb.ToString());

    }

}