#include <vector>
#include <string>
#include <algorithm>
#include <numeric>
#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <utility>
#include <list>
#include <functional>
#include <queue>
#include <map>
#include <iterator>
#include <iomanip>
#include <complex>
using namespace std;

using ull = unsigned long long;
using ll = long long;


int main()
{
  string A;
  string B;
  cin >> A >> B;

  int data1[3] = {};
  int data2[3] = {};

  string tmp = "";
  int count = 0;
  for(int i = 0; i < A.size(); ++i)
  {
    if(A.at(i) == '.')
    {
      data1[count] = stoi(tmp);
      ++count;
      tmp = "";
    }
    else
      tmp += A.at(i);
  }

  data1[2] = stoi(tmp);

  tmp = "";
  count = 0;
  for(int i = 0; i < B.size(); ++i)
  {
    if(B.at(i) == '.')
    {
      data2[count] = stoi(tmp);
      ++count;
      tmp = "";
    }
    else
      tmp += B.at(i);
  }

  data2[2] = stoi(tmp);

  if(data1[0] < data2[0])
    cout << "NO" << endl;
  else if(data1[0] > data2[0])
    cout << "YES" << endl;
  else if(data1[1] < data2[1])
    cout << "NO" << endl;
  else if(data1[1] > data2[1])
    cout << "YES" << endl;
  else if(data1[2] < data2[2])
    cout << "NO" << endl;
  else
    cout << "YES" << endl;

}