#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <fstream>
#include <sstream>
#include<set>
#include<stack>
#include<time.h>
#include <sys/types.h>
#include <tuple>
#include <numeric>
#include <iterator>

typedef long long int ll;
//#include<bits/stdc++.h>


using namespace std;





int main()
{

    int Q;
    Q = 1;
    //cin >> Q;


    while (Q--) {
        string a, b, c;
        cin >> a >> b >> c;
        string x, y, z;
        cin >> x >> y >> z;
        if (b.size() > y.size())cout << a;
        else if (b.size() < y.size())cout << x;
        
        else if (b > y)cout << a;
        else if (b < y)cout << x;
        else cout << -1;
        
    }
    return 0;
}