/* -*- coding: utf-8 -*-
 *
 * 138.cc: No.138 化石のバージョン - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

void read_ver(string &s, int &a, int &b, int &c) {
  a = b = c = 0;
  int pos = 0;
  while (pos < s.size() && s[pos] != '.') a = 10 * a + s[pos++] - '0';
  pos++;
  while (pos < s.size() && s[pos] != '.') b = 10 * b + s[pos++] - '0';
  pos++;
  while (pos < s.size()) c = 10 * c + s[pos++] - '0';
}

/* main */

int main() {
  string s0, s1;
  cin >> s0 >> s1;

  int a0, b0, c0, a1, b1, c1;
  read_ver(s0, a0, b0, c0);
  read_ver(s1, a1, b1, c1);
  //printf("%d.%d.%d <-> %d.%d.%d\n", a0, b0, c0, a1, b1, c1);

  bool ans =
    a0 > a1 || (a0 == a1 && (b0 > b1 || (b0 == b1 && c0 >= c1)));
  cout << (ans ? "YES" : "NO") << endl;
  return 0;
}