#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <sstream>
using namespace std;

//split(string,区切り文字)
vector<string> split(const string& i, char del) {
    istringstream stream(i);

    string field;
    vector<string> result;
    while (getline(stream, field, del)) {
      result.push_back(field);
    }
    return result;
}

int sp(const string&i, int num){
    int a = stoi(split(i,'.')[num]);
    return a;
}

int main(){

  string m,n;
  cin >> m >> n;
  if (sp(m, 0) > sp(n, 0)) {
    cout << "YES" << "\n";
  }else if (sp(m, 0) < sp(n, 0)) {
    cout << "NO" << "\n";
  }else{
    if (sp(m, 1) > sp(n, 1)) {
      cout << "YES" << "\n";
    }else if (sp(m, 1) < sp(n, 1)) {
      cout << "NO" << "\n";
    }else{
      if (sp(m, 2) >= sp(n, 2)) {
        cout << "YES" << "\n";
      }else if (sp(m, 2) < sp(n, 2)) {
        cout << "NO" << "\n";
      }
    }
  }

  return 0;
}