using System;
using System.Linq;
using System.IO;
using System.Text;
using System.Collections;
using System.Collections.Generic;

class Solution
{
    static void Main(string[] args)
    {
        string s = Console.ReadLine();
        string yuki = "yukicoder";
        for (int i = 0; i < 9; i++)
        {
            if (yuki[i] != s[i])
            {
                Console.WriteLine(yuki[i].ToString());
            }
        }
    }
}