using System;

namespace _09._On_Time_for_the_Exam
{
    class Program
    {
        static void Main(string[] args)
        {
            int examStartHour = int.Parse(Console.ReadLine());
            int examStartMinute = int.Parse(Console.ReadLine());
            int timeOfArrivingHour = int.Parse(Console.ReadLine());
            int timeOfArrivingMunute = int.Parse(Console.ReadLine());

            // 1. input (transform) data to DateTime variable
            DateTime examStart = DateTime.Parse(examStartHour +  ":" + examStartMinute);
            DateTime arriving = DateTime.Parse(timeOfArrivingHour + ":" + timeOfArrivingMunute);

            // 2. work with dateTime variables
            TimeSpan difference = examStart - arriving;
            TimeSpan differenceNegative = arriving - examStart; //there are planty ways to change negative to positive TimeSpan... this is lazy way :)

            // 3. back DateTime variable to string etc
            string tempStrForPrnHourseAndMin = difference.ToString(@"h\:mm");
            string tempStrForPrnOnlyMinutes = difference.ToString("%m");

            // lazy way (this is not a good way to change negative to posive value of the variable)
            string tempStrForPrnHourseAndMinNegative = differenceNegative.ToString(@"h\:mm");
            string tempStrForPrnOnlyMinutesNegative = differenceNegative.ToString("%m");


            if (difference >= TimeSpan.Parse("0.00:00:00"))
            {
                // first row of PRN
                if (difference <= TimeSpan.Parse("0.00:30:00"))
                {
                    Console.WriteLine("On time");
                }
                else
                {
                    Console.WriteLine("Early");
                }

                // second row of PRN
                if (difference >= TimeSpan.Parse("0.01:00:00"))
                {
                    Console.WriteLine($"{tempStrForPrnHourseAndMin} hours before the start");
                }
                else
                {
                    if (difference == TimeSpan.Parse("0.00:00:00"))
                    {
                        // nothing to prn
                    }
                    else
                    {
                        Console.WriteLine($"{tempStrForPrnOnlyMinutes} minutes before the start");
                    }

                }
            }

            else
            {
                // first row of prn
                Console.WriteLine("Late");

                // second rpw of prn
                if (differenceNegative < TimeSpan.Parse("0.01:00:00"))
                {
                    Console.WriteLine($"{tempStrForPrnOnlyMinutesNegative} minutes after the start");
                }
                else
                {
                    Console.WriteLine($"{tempStrForPrnHourseAndMinNegative} hours after the start");
                }
            }
        }
    }
}