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)
        {
            int i = 0;
            do
            {
                Console.WriteLine(i.ToString("D3"));
                i++;
            }
            while (Console.ReadLine() != "unlocked");
        }
    }
}