#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<vector>
#include<string.h>
#include<math.h>
#include<map>
#include<iomanip>
#include<queue>

const long long INF = 1e6+7;
const long long MOD = 1e9+7;
const double PI=acos(-1);

using namespace std;

int main(){
	int a0,b0,c0;
	int a1,b1,c1;
	char temp;
	cin >> a0 >> temp >> b0 >> temp >> c0;
	cin >> a1 >> temp >> b1 >> temp >> c1;
	
	if(a0>a1){
		cout << "YES" << endl;
		return 0;
	}else if(a0<a1){
		cout << "NO" << endl;
		return 0;
	}else{
		if(b0>b1){
			cout << "YES" << endl;
			return 0;
		}else if(b0<b1){
			cout << "NO" << endl;
			return 0;
		}else{
			if(c0>c1){
				cout << "YES" << endl;
				return 0;
			}else if(c0<c1){
				cout << "NO" << endl;
			}else{
				cout << "YES" << endl;
				return 0;
			}
		}
	}
	
	return 0;
}