#include <iostream>
#include <cmath>
#include <string>
using namespace std;
int main (){
double examHour,minuteExam,hourofArrival,minuteofArrival;
cin >> examHour>>minuteExam>>hourofArrival>>minuteofArrival;

 int examTime = (examHour *60) + minuteExam;
 int arrivalTime = ( hourofArrival * 60) + minuteofArrival;
 int marginTime = arrivalTime - examTime;
 int marginSecond = examTime - arrivalTime;


 if(marginTime <= 59 && marginTime > 0)
 {
    cout << "Late " << marginTime << " minutes after the start"<<endl;

 }
 else if( marginSecond == 0 ){
    cout <<"On time " << endl;

}else if (marginTime >=60 )
{
    int hour = marginTime / 60;
    int minutes = marginTime % 60;

    cout << "Late "<< hour << ":"<< minutes<< "hours after the start"<<endl;

}else if(marginSecond <= 30 && marginSecond > 0 ){
 cout <<"On time "<< marginSecond << "minutes before the start" <<endl;

 }else if(marginSecond > 30 && marginSecond < 60 ){
 cout <<"Early "<< marginSecond << "minutes before the start"<<endl;

 }else if (marginSecond >= 60 )
 {
     int hour = marginSecond /60;
     int minutes =marginSecond % 60;
     cout << "Early " <<marginSecond<< "hours before the start."<<endl;



 }else if (marginSecond >= 60){
     int hour = marginSecond /60;
     int minutes =marginSecond % 60;
   cout << "Early " <<hour<<":"<< minutes<< "hours before the start."<<endl;
 }



return 0;}