On Time for the Exam

exam_hour = int(input())
exam_minute = int(input())
arrival_hour = int(input())
arrival_minute = int(input())

exam_time = (exam_hour * 60) + exam_minute
arrival_time = (arrival_hour * 60) + arrival_minute

if exam_time == arrival_time:
    print("On time")
elif exam_time > arrival_time:
    result = exam_time - arrival_time
    if result <= 30:
        print("On time")
        print(f'{result} minutes before the start')
    elif 30 < result < 60:
        print("Early")
        print(f'{result} minutes before the start')
    if result >= 60:
        print("Early")
        h = result / 60
        m = result % 60
        if m <= 9:
            print(f'{int(h)}:0{m} hours before the start')
        else:
            print(f'{int(h)}:{m} hours before the start')
elif arrival_time > exam_time:
    result = arrival_time - exam_time
    if result < 60:
        print("Late")
        print(f'{result} minutes after the start')
    elif result >= 60:
        print("Late")
        h = result / 60
        m = result % 60
        if m <= 9:
            print(f'{int(h)}:0{m} hours after the start')
        else:
            print(f'{int(h)}:{m} hours after the start')