#include <iostream>
using namespace std;
#define ll long long

int main(){
    int n, m, k, l,s,h;
    char a, b, c ,d;
    cin >> n >> a >> m >> b >> k >> l >> c >> s >> d >> h;
    if(n > l){
        cout << "YES" << endl;
    }
    else if(n == l){
        if(m > s){
            cout << "YES" << endl;
        }
        else if(m == s){
            if(k >= h){
                cout << "YES" << endl;
            }
            else cout << "NO" << endl;
        }
        else cout << "NO" << endl;
    }
    else cout << "NO" << endl;
        
    return 0;
}