using System;

public class Program

{

    public static void Main()

    {

        //Conditional Statements Advanced - Exercise - 08. On Time for the Exam

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

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

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

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

​

            int examTotalMinutes = examHour * 60 + examMinutes;

            int arrivalTotalMinutes = arrivalHour * 60 + arrivalMinutes;

​

            int differenceTime = Math.Abs(examTotalMinutes - arrivalTotalMinutes);

            int differenceHour = differenceTime / 60;

            int differenceMinutes = differenceTime % 60;

​

            if (arrivalTotalMinutes > examTotalMinutes)   //-------late---------------------

            {

                Console.WriteLine("Late");

                if (differenceHour < 1 || differenceHour > 23) //ако часа е 0

                {

                     Console.WriteLine($"{differenceMinutes} minutes after the start"); //ако минутите са >=10

                }

                else  //ако часа е между 0 и 24

                {

                    if (differenceMinutes < 10) //ако минутите са <10

                    {

                        Console.WriteLine($"{differenceHour}:0{differenceMinutes} hours after the start");

                    }

                    else Console.WriteLine($"{differenceHour}:{differenceMinutes} hours after the start"); //ако минутите са >=10

                }

            }

            else if (arrivalTotalMinutes < examTotalMinutes - 30)  //------------early-------------------

            {

                Console.WriteLine("Early");

                if (differenceHour < 1)

                {

                     Console.WriteLine($"{differenceMinutes} minutes before the start"); //ако минутите са >=10

                }

                else //ако часа е между 0 и 24

                {

                    if (differenceMinutes < 10) //ако минутите са <10

                    {

                        Console.WriteLine($"{differenceHour}:0{differenceMinutes} hours before the start");

                    }

                    else Console.WriteLine($"{differenceHour}:{differenceMinutes} hours before the start"); //ако минутите са >=10

                }

            }

            else // -----------on time---------------------

            {

                Console.WriteLine("On Time");

                if (arrivalTotalMinutes != examTotalMinutes) 

                {

                    Console.WriteLine($"{differenceMinutes} minutes before the start");

                }

            }

    }

}