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

namespace ConsoleApp92
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = Console.ReadLine();
            string moto = "0";
            string kawa = "9";
            char[] v = new char[]{'a', 'b', 'c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
            for(int i = 0; i < 26; i++)
            {
                if (v[i] != s[i])
                {
                    moto = s[i].ToString();
                    kawa = v[i].ToString();
                }
            }
            Console.WriteLine(kawa + "to" + moto);
            Console.ReadLine();
        }
    }
}