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

namespace _10.BeerTime
{
    class BeerTime
    {
        static void Main()
        {
            Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
            string format = "hh:mm tt";
            string wishTime = Console.ReadLine();
            string startTime = "01:00 PM";
            string endTime = "03:00 AM";
            DateTime wish = DateTime.ParseExact(wishTime, format, CultureInfo.InvariantCulture);
            DateTime startBeerTime = DateTime.ParseExact(startTime, format, CultureInfo.InvariantCulture);
            DateTime endBeerTime = DateTime.ParseExact(endTime, format, CultureInfo.InvariantCulture);
            if ((wish > startBeerTime) && (wish < endBeerTime))
            {
                Console.WriteLine("beer time!");
            }
            else
            {
                Console.WriteLine("non beer!");
            }
        }
    }
}