#include <iostream>
#include <string>
using namespace std;
int main(int argc, char* argv[])
{
	string name1,name2;
	string PA,PB;
	char XA,XB;
	cin>>name1>>PA>>XA;
	cin>>name2>>PB>>XB;
	if (PA.length()>PB.length()){
		cout<<name1<<endl;
		return 0;
	}else if (PA.length()<PB.length()){
		cout<<name2<<endl;
		return 0;
	}
	int P=PA.compare(PB);
	if (P>0){
		cout<<name1<<endl;
	}else if (P<0){
		cout<<name2<<endl;
	}else{
		cout<<-1<<endl;
	}

	return 0;
}