using System;

namespace No304
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			var n = Convert.ToInt32(Console.ReadLine ());
			while (true) {
				var k = Convert.ToInt32(Console.ReadLine ());
				if (k == n) {
					Console.WriteLine ("unlocked");
					return;
				}
				Console.WriteLine ("locked");
			}
		}
	}
}