using System;

namespace Hotel_Room
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int examHours = int.Parse(Console.ReadLine());
            int examMinutes = int.Parse(Console.ReadLine());
            int arriveHours = int.Parse(Console.ReadLine());
            int arriveMinutes = int.Parse(Console.ReadLine());

            int arriveHoursMinutes = arriveMinutes + arriveHours * 60;
            int examHoursMinutes = examMinutes + examHours * 60;

            int hours = 0;
            int minutes = 0;

            if (examHours == arriveHours && examMinutes == arriveMinutes)
            {
                Console.WriteLine("On time");
            }

            else if (examHoursMinutes > arriveHoursMinutes)
            {
                int earlyMinutes = examHoursMinutes - arriveHoursMinutes;
                int earlyHours = examHours - arriveHours;
                hours = earlyMinutes / 60;
                minutes = earlyMinutes % 60;
                if (earlyHours >= 1 && examMinutes >= arriveMinutes)
                {
                    Console.WriteLine($"Early {earlyHours}:{minutes:d2} hours before the start");
                }
                else
                {

                    if (minutes <= 30 || examMinutes == arriveMinutes)
                    {
                        Console.WriteLine($"On time {minutes} minutes before the start");
                    }
                    else if (hours >= 1 || minutes > 30 && minutes > 59)
                    {
                        Console.WriteLine($"Early {hours}:{minutes} hours before the start");
                    }
                    else if (minutes <= 59)
                    {
                        Console.WriteLine($"Early {minutes} minutes before the start");
                    }
                }
            }
            else
            {
                int lateMinutes = arriveHoursMinutes - examHoursMinutes;
                hours = lateMinutes / 60;
                minutes = lateMinutes % 60;
                if (hours >= 1 || minutes > 59)
                {
                    Console.WriteLine($"Late {hours}:{minutes} hours after the start");
                }
                else if (minutes <= 59)
                {
                    Console.WriteLine($"Late {minutes} minutes after the start");
                }
            }

        }
    }
}