using System;

namespace OnTimeForExam
{
    class OnTimeForExam
    {
        static void Main()

        {

            var hourOfExam = byte.Parse(Console.ReadLine());

            var minutesOfExam = byte.Parse(Console.ReadLine());

            var arriveForExamInHours = byte.Parse(Console.ReadLine());

            var arriveForExamInMinutes = byte.Parse(Console.ReadLine());


            var oneHour = 60;

            var sixtyMinutes = 60;

            if (arriveForExamInHours > hourOfExam)

            {
                var totalHours = oneHour * (arriveForExamInHours - hourOfExam);

                var totalMin = (totalHours + arriveForExamInMinutes);

                var leftMinutes = totalMin - minutesOfExam;

                if (leftMinutes <= 59)

                {

                    Console.WriteLine("Late {0} minutes after the start", leftMinutes);

                }

                else if (leftMinutes <= 59 && leftMinutes > 0)

                {

                    Console.WriteLine("On time");

                }

                else

                {

                    var hourLeft = leftMinutes / oneHour;

                    var total = leftMinutes % sixtyMinutes;



                    if (total< 10 && leftMinutes >= 0)

                    {



                        Console.WriteLine("Late {0}:0{1} hours after the start", hourLeft, total);



                    }

                    else

                    {

                        Console.WriteLine("Late {0}:{1} hours after the start", hourLeft, total);

                   }

                }



            }

            else if (hourOfExam > arriveForExamInHours)

            {

                var totalHours = oneHour * (hourOfExam - arriveForExamInHours);

                var totalMin = (totalHours - arriveForExamInMinutes);

                var leftMinutes = totalMin + minutesOfExam;


                if (leftMinutes <= 30 && leftMinutes > 0)

                {

                    Console.WriteLine("On time {0} minutes before the start", leftMinutes);

                }

                else if (leftMinutes == 0)

                {

                    Console.WriteLine("On time");

                }

                else if (leftMinutes <= 59 && leftMinutes > 30)

                {

                    Console.WriteLine("Early {0} minutes before the start", leftMinutes);

                }

                else

                {

                    var hourLeft = leftMinutes / oneHour;

                    var total = leftMinutes % sixtyMinutes;



                    if (total< 10)

                    {

                        Console.WriteLine("Early {0}:0{1} hours before the start", hourLeft, total);
                   }

                    else

                    {

                        Console.WriteLine("Early {0}:{1} hours before the start", hourLeft, total);

                    }

                }
            }

            else if (hourOfExam == arriveForExamInHours && minutesOfExam == arriveForExamInMinutes)

            {

                Console.WriteLine("On time");

            }

            else if (hourOfExam == arriveForExamInHours)

            {

                if (minutesOfExam > arriveForExamInMinutes)

                {
                    if (minutesOfExam > 30 && minutesOfExam <= 59)

                    {

                        var checkMin = minutesOfExam - arriveForExamInMinutes;

                        Console.WriteLine("Early {0} minutes before the start", Math.Abs(checkMin));

                    }
                    else
                    {
                        var checkMin = minutesOfExam - arriveForExamInMinutes;

                        Console.WriteLine("On time {0} minutes before the start", Math.Abs(checkMin));
                    }


                }

                else

                {

                    if (arriveForExamInMinutes > minutesOfExam)

                    {

                        //if (arriveForExamInMinutes)

                        //{

                            var lateMin = arriveForExamInMinutes - minutesOfExam;

                            Console.WriteLine("Late {0} minutes after the start", Math.Abs(lateMin));

                        //}

                    }

                }

            }

        }

    }

}