#include <iostream>
#include <map>
#include <cstdio>
using namespace std;
#define fi first
#define se second

int main() {
    pair<int,pair<int,int> > t1, t2;
    scanf("%d.%d.%d\%d.%d.%dn", &t1.fi, &t1.se.fi, &t1.se.se, &t2.fi, &t2.se.fi, &t2.se.se);
    cout << (t2 <= t1 ? "YES" : "NO") << endl;
    return 0;
}