#include <iostream>
using namespace std;

int main() {
  int A, B, C, a, b, c;
  char d;
  bool f = true;
  cin >> A >> d >> B >> d >> C;
  cin >> a >> d >> b >> d >> c;
  if (A < a) f = false;
  else if (A == a && B < b) f = false;
  else if (A == a && B == b && C < c) f = false;
  if (f) cout << "YES" << endl;
  else cout << "NO" << endl;
}