#include<iostream>
#include<string>
#include<algorithm>
#include<cmath>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include<random>
#include<ctime>
#include<cstdlib>
using namespace std;

int main(){

  int a[2], b[2], c[2];
  char s,t;
  for(int i=0; i<2; i++){
    cin >> a[i] >> s >> b[i] >> t >> c[i];
  }

  if(a[0]>a[1]){
    cout << "YES" << endl;
  } else if(a[0]<a[1]){
    cout << "NO" << endl;
  } else {
    if(b[0]>b[1]){
      cout << "YES" << endl;
    } else if(b[0]<b[1]){
      cout << "NO" << endl;
    } else {
      if(c[0]>c[1]){
        cout << "YES" << endl;
      } else if(c[0]<c[1]){
        cout << "NO" << endl;
      } else {
        cout << "YES" << endl;
      }
    }
  }

  return 0;
}