#include <bits/stdc++.h>
#define int long long
#define double long double
using namespace std;
const int MOD = 1000000007;
const int INF = 1e14;
using Graph = vector<vector<int>>;

signed main(){
  vector<int> A(3, 0);
  vector<int> B(3, 0);
  string S, T;
  cin >> S >> T;
  int cnt = 0;
  for( int i = 0; i < S.size(); i++ ){
    if( S[i] == '.' ){
      cnt++;
      continue;
    }
    A[i] = A[i]*10 + (S[i]-'0');
  }
  cnt = 0;
  for( int i = 0; i < T.size(); i++ ){
    if( T[i] == '.' ){
      cnt++;
      continue;
    }
    B[i] = B[i]*10 + (T[i]-'0');
  }

  if( A[0] > B[0] || (A[0]==B[0]&&A[1]>B[1]) || (A[0]==B[0]&&A[1]==B[1]&&A[2]>B[2]) ) cout << "YES" << endl;
  else cout << "NO" << endl;
}