using System;

namespace yukicoder
{
    class Program
    {   /// <summary>
        /// 置き換え対象文字
        /// </summary>
        private const string TREEONE = "treeone";

        /// <summary>
        /// 置き換え文字
        /// </summary>
        private const string FOREST = "forest";
        static void Main(string[] args)
        {
            var input = Console.ReadLine();
            Console.WriteLine(input.Replace(TREEONE, FOREST));
        }
    }
}