#include<iostream>

using namespace std;

int main(void)
{

	int a,b,c,d,t;//t:补的时间 
	cin>>a>>b>>c>>d;
	
	if(b!=0){
		t=60-b;//t==10
		a++;
		b=0;
	}
	
	//13  00   19  55
	int hour = c - a;// 6 
	int minute = d + t;// 5
	
	if(minute>60){
		minute-=60;
		hour++;
	}
	
	cout<<hour<<"   "<<minute<<endl;
	return 0;
}
/**************************************************************
	Problem: 1462
	User: 231308061
	Language: C++
	Result: Wrong Answer
****************************************************************/