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

namespace y1217
{
    class Program
    {
        static void Main(string[] args)
        {
            string S = Console.ReadLine();
            char ch = 'a';
            string result = string.Empty;
            for(int i = 0; i < 26; i++)
            {
                char newch = (char)(ch + i);
                if(S[i] != newch)
                {
                    result = newch + "to" + S[i];
                }
            }
            Console.WriteLine(result);
        }
    }
}