#include <bits/stdc++.h>
using namespace std;
int tk() {
int a,b,c;
cin>>a;
cin.ignore();
cin >>b;
cin.ignore();
cin>>c;
return a * 1000000 + b * 1000 + c;
}
int main(){
int q = tk(); int r = tk();
cout << (q >= r ? "YES" : "NO") << endl;
}