#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

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