#include <iostream>
using namespace std;

int main()
{
    int examHour, examMinute, arrivalHour, arrivalMinute;
    cin >> examHour >> examMinute >> arrivalHour >> arrivalMinute;
    int totalExamTime;
    int totalArrivalTime;
    int secondsResult;

    totalExamTime = (examHour * 60 * 60) + (examMinute * 60);
    totalArrivalTime = (arrivalHour * 60 * 60) + (arrivalMinute * 60);

    if (totalArrivalTime == totalExamTime || totalExamTime - totalArrivalTime >= 0 && totalExamTime - totalArrivalTime <= 1800)
    {
        secondsResult = (totalExamTime - totalArrivalTime) / 60;
        cout << "On time" << endl;
        cout << secondsResult << " minutes before the start";
    }
    else if (totalArrivalTime > totalExamTime)
    {
        cout << "Late" << endl;
        secondsResult = totalArrivalTime - totalExamTime;
        secondsResult = secondsResult / 60;
        if (secondsResult <= 59)
        {
            cout << secondsResult << " minutes after the start";
        }
        else if (secondsResult > 59)
        {
            if (secondsResult % 60 < 10)
            {
                cout << secondsResult / 60 << ":0" << secondsResult % 60 << " hours after the start";
            }
            else
            {
                cout << secondsResult / 60 << ':' << secondsResult % 60 << " hours after the start";
            }

        }
    }
    else if (totalExamTime > totalArrivalTime)
    {
        cout << "Early" << endl;
        secondsResult = totalExamTime - totalArrivalTime;
        secondsResult = secondsResult / 60;
        if (secondsResult <= 59)
        {
            cout << secondsResult << " minutes before the start";
        }
        else if (secondsResult > 59)
        {
            if (secondsResult % 60 < 10)
            {
                cout << secondsResult / 60 << ":0" << secondsResult % 60 << " hours before the start";

            }
            else
            {
                cout << secondsResult / 60 << ':' << secondsResult % 60 << " hours before the start";
            }

        }

    }

}