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

int main() {
    int A0, B0, C0, A1, B1, C1;
    scanf("%d.%d.%d", &A0, &B0, &C0);
    scanf("%d.%d.%d", &A1, &B1, &C1);

    if (A0 * 101 * 101 + B0 * 101 * C0 >= A1 * 101 * 101 + B1 * 101 + C1)
        cout << "YES" << endl;
    else
        cout << "NO" << endl;
}