OnTimeForExam

import java.util.Scanner;
public class OnTimeForTheExam
{
    public static void main (String[]args)
    {
        Scanner scan = new Scanner (System.in);

        int examHour = scan.nextInt ();
        int examMinutes = scan.nextInt ();
        int arrivingHour = scan.nextInt ();
        int arrivingMinutes = scan.nextInt ();

        int examTimeMinutes = examHour * 60 + examMinutes;
        int arrivingTimeMinutes = arrivingHour * 60 + arrivingMinutes;

        String condition = "";

        if ((examTimeMinutes - arrivingMinutes) <= 30)
        {
            System.out.println ("On time");
            condition = "ontime";
        }
        else if (arrivingTimeMinutes > examTimeMinutes)
        {
            System.out.println ("Late");
            condition = "late";
        }
        else if (examTimeMinutes - arrivingTimeMinutes > 30)
        {
            System.out.println ("Early");
            condition = "early";
        }

        if (condition.equals ("early")
                && (examTimeMinutes - arrivingTimeMinutes) > 60)
        {
            System.out.print ((examTimeMinutes - arrivingTimeMinutes) / 60);
            System.out.print (":");
            System.out.print ((examTimeMinutes - arrivingTimeMinutes) % 60);
            System.out.print ("earlier");
        }
        else if (condition.equals ("early"))
        {
            System.out.print ((examTimeMinutes - arrivingTimeMinutes) % 60);
            System.out.print ("earlier");
        }
        if (condition.equals ("late")
                && (arrivingTimeMinutes - examTimeMinutes) > 60)
        {
            System.out.print ((arrivingTimeMinutes - examTimeMinutes) / 60);
            System.out.print (":");
            System.out.print ((arrivingTimeMinutes - examTimeMinutes) % 60);
            System.out.print ("earlier");
        }
        else if (condition.equals ("late"))
        {
            System.out.print ((arrivingTimeMinutes - examTimeMinutes) % 60);
            System.out.print ("after");
        }
    }
}