#include <iostream>
using namespace std;

int main() {
    int a0, b0, c0, a1, b1, c1;
    char dot;
    cin >> a0 >> dot >> b0 >> dot >> c0;
    cin >> a1 >> dot >> b1 >> dot >> c1;
    if (a0 * 101 * 101 + b0 * 101 + c0 >= a1 * 101 * 101 + b1 * 101 + c1)
        cout << "YES\n";
    else
        cout << "NO\n";
    return 0;
}