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

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

    if (A0 * 1001 * 1001 + B0 * 1001 * C0 >= A1 * 1001 * 1001 + B1 * 1001 + C1)
        cout << "YES" << endl;
    else
        cout << "NO" << endl;
}