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

namespace YukiCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            int i = 0;
            while(true)
            {
                Console.WriteLine(i++.ToString("D3"));
                var s = Console.ReadLine();
                if (s == "unlocked") break;
            }
        }
    }
}