using System;

namespace _304
{
    class Program
    {
        static void Main(string[] args)
        {
            int i = 0;
            while (true)
            {
                Console.WriteLine(i.ToString("D3"));
                Console.Clear();
                string s = Console.ReadLine();
                if (s == "unlocked") break;
                i++;
            }
        }
    }
}