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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 0; i < 999; i++)
            {
                Console.WriteLine( i.ToString("D3"));
                if (Console.ReadLine() == "unlocked")
                {
                    string ans = i.ToString("D3");
                }
            }
        }
    }
}