#include<iostream>
#include<cmath>
#include<string>
#include<algorithm>
#include<stdio.h>
#include<cstdlib>
using namespace std;
int main(){
    string p[2];
    string name[2];
    string hand;
    for(int i=0;i<2;i++){
        cin >> name[i];
        cin >> p[i];
        cin >> hand;
    }
    if(p[0]<p[1])cout << name[1] << endl;
    else if(p[0]>p[1])cout << name[0] << endl;
    else cout << -1 << endl;
}