using System;

​

public class Program

{

    public static void Main()

    {

        var examHours = int.Parse(Console.ReadLine()); 

        while(examHours < 0 || examHours > 23)

        {

            Console.WriteLine("Некоректни данни числото трябва да бъде в интервала от 0 до 23");

             examHours = int.Parse(Console.ReadLine());

        }

        var examMinutes = int.Parse(Console.ReadLine());

        var arrivalHours = int.Parse(Console.ReadLine());

        var arrivalMinutes = int.Parse(Console.ReadLine());

        var examTime = (examHours * 60) + examMinutes;

        var arrivalTime = (arrivalHours * 60) + arrivalMinutes;

        if (arrivalTime > examTime)

        { 

             Console.WriteLine("Late");

        }

        else if (arrivalTime >= examTime - 30 && arrivalTime <= examTime)

        {

            Console.WriteLine("On Time");

        }

        else 

        {

            Console.WriteLine("Early");

        }

        if (examTime != arrivalTime)

        {

            if (arrivalTime <= examTime && arrivalTime >= examTime - 59)

            {

                Console.Write("{0} minutes before the start", examTime - arrivalTime);

            }

            else if (arrivalTime <= examTime && arrivalTime <= examTime - 59)           

            {

                Console.Write("{0}:{1:00} hours before the start", examHours - arrivalHours, Math.Abs(examMinutes - arrivalMinutes));

            }

            else if (arrivalTime > examTime && arrivalTime <= examTime + 59)

            {

                Console.Write("{0} minutes after the start", arrivalTime - examTime);

            }

            else

            {

                Console.Write("{0}:{1:00} hours after the start", arrivalHours - examHours, Math.Abs(examMinutes - arrivalMinutes));

            }

        }

    }

}            

​