using System;
using System.Text;
using System.Linq;

namespace ConsoleApp11
{
    class Program
    {
        static void Main(string[] args)
        {
            string S = Console.ReadLine();

            string Y = "yukicoder";

            for(int i = 0; i < S.Length; i++)
            {
                if(S[i] == '?')
                {
                    Console.WriteLine(Y[i]);
                    break;
                }
            }
        }        
    }
}