#include<bits/stdc++.h>
using namespace std;

int main(){  
    string Sa, Sb, Xa, Xb; long long int Pa, Pb; cin >> Sa >> Pa >> Xa >> Sb >> Pb >> Xb;
    if(Pa > Pb){
        cout << Sa << endl;
    }else if(Pa < Pb){
        cout << Sb << endl;
    }else{
        cout << -1 << endl;
    }
    return 0;
}