#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

int main(){
    int pa, pb;
    string sa, xa, sb, xb;
    cin >> sa >> pa >> xa >> sb >> pb >> xb;
    cout << ((pa > pb) ? sa : ((pa == pb) ? "-1" : sb)) << endl;
}