#include <bits/stdc++.h>
using namespace std;

int main(){
	string data1,data2;
	cin >> data1 >> data2;
	string tmp = "";
	vector<int> x;
	vector<int> y;
	for(int i = 0; i < data1.size(); i++){
		if(data1[i] != '.')	tmp += data1[i];
		else{
			x.push_back(stoi(tmp));
			tmp = "";
		}
	}
	x.push_back(stoi(tmp));
	tmp = "";
	for(int i = 0; i < data2.size(); i++){
		if(data2[i] != '.')	tmp += data2[i];
		else{
			y.push_back(stoi(tmp));
			tmp = "";
		}		
	}
	y.push_back(stoi(tmp));
	for(int i = 0; i < 3; i++){
		if(x[i] > y[i]){
			cout << "YES" << endl;
			return 0;
		}else if(x[i] < y[i]){
			cout << "NO" << endl;
			return 0;
		}
	}
	cout << "YES" << endl;
	return 0;
}