#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdlib>
#include <ctime>
#include <cstdio>
#include <functional>
#include <set>
#include <sstream>
#include <map>
#include <queue>
#include <stack>

using namespace std;


int main()
{
	string name1,name2,score1,score2,dummy;
	cin>>name1>>score1>>dummy>>name2>>score2>>dummy;
	
	if(score1<score2) cout<<name2<<endl;
	else if(score1>score2) cout<<name1<<endl;
	else cout<<-1<<endl;

	return 0;
}