On Time for the Exam

start_exam_hour = int(input())
start_exam_minutes = int(input())
hour_of_arrive = int(input())
minute_of_arrive = int(input())
diff_minutes = 0
hour = 0
minutes = 0

exam_time_in_minutes = (start_exam_hour * 60) + start_exam_minutes
exam_time_of_arrive_in_minutes = (hour_of_arrive * 60) + minute_of_arrive

if exam_time_of_arrive_in_minutes == exam_time_in_minutes:
    print('On time')

elif exam_time_of_arrive_in_minutes < exam_time_in_minutes:
    diff_minutes = exam_time_in_minutes - exam_time_of_arrive_in_minutes
    hour = diff_minutes // 60
    minutes = diff_minutes % 60

    if diff_minutes <= 30:
        print('On time')
        print(f'{minutes} minutes before the start')
    else:
        print('Early')
        if diff_minutes < 60:
            print(f'{minutes} minutes before the start')
        else:
            print(f'{hour}:{minutes:02d} hours before the start')

elif exam_time_of_arrive_in_minutes > exam_time_in_minutes:
    diff_minutes = exam_time_of_arrive_in_minutes - exam_time_in_minutes
    hour = diff_minutes // 60
    minutes = diff_minutes % 60
    print('Late')
    if diff_minutes < 60:
        print(f'{diff_minutes} minutes after the start')
    else:
        print(f'{hour}:{minutes:02d} hours after the start')