using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace template
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = Console.ReadLine();
            string a = "yukicoder";
            for (int i = 0; i < 9; i++)
            {
                if (s[i] == '?') Console.WriteLine(a[i]);
            }
        }
    }
}