#include<iostream>
#include<algorithm>
#include <vector>
#include<cmath>
#include<iomanip>
using namespace std;
typedef long long int lont;
int main() {
	int v1, v2, v3, v4, v5, v6;
	char q1, q2, q3, q4;
	cin >> v1 >> q1 >> v2 >> q2 >> v3 >> v4 >> q3 >> v5 >> q4 >> v6;
	vector<int>vecb(6);
	vecb = { v1,v2,v3,v4,v5,v6 };

	if (vecb.at(0) < vecb.at(3)) {
		cout << "NO" << endl;
	}
	else if (vecb.at(0) > vecb.at(3)) {
		cout << "YES" << endl;
	}
	else {
		if (vecb.at(1) < vecb.at(4)) {
			cout << "NO" << endl;
		}
		else if (vecb.at(1) > vecb.at(4)) {
			cout << "YES" << endl;
		}
		else {
			if (vecb.at(2) < vecb.at(5)) {
				cout << "NO" << endl;
			}
			else if (vecb.at(2) > vecb.at(5)) {
				cout << "YES" << endl;
			}
			else {
				cout << "YES" << endl;
			}
		}
	}
}