#include <iostream>
#include <string>
using namespace std;

int main(){
   unsigned long long pa,pb;
   string na,nb,ha,hb;
   cin >> na >> pa >> ha >> nb >> pb >> hb;
   if(pa == pb){
      cout << -1 << endl;
      return 0;
   }
   cout << (pa > pb ? na : nb) << endl;
}