#include <bits/stdc++.h>

#include <boost/algorithm/string.hpp>
#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;

int func(const string &str) {
  vector<string> v;
  boost::split(v, str, boost::is_any_of("."));
  return stoi(v[0]) * 10000 + stoi(v[1]) * 100 + stoi(v[2]);
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  string a, b;
  cin >> a >> b;

  string ans = "YES";
  if (func(a) < func(b)) ans = "NO";
  cout << ans << endl;
  getchar();
}