#include <iostream>
#include <sstream>
#include <math.h>
#include <stack>
#include <set>
#include <algorithm>
#include <string>
#include <queue>
#include <stack>
#include <map>
#include <cstdio>
#include <vector>
using namespace std;

#define INF (1 << 30)
#define INFLL (1LL << 60)

int main() {
	char kon;
	int a1,a2,a3;
	int b1,b2,b3;
	cin >> a1 >> kon >> a2 >> kon >> a3;
	cin >> b1 >> kon >> b2 >> kon >> b3;
	if(a1 > b1 || (a1 == b1 && a2 > b2) || (a1 == b1 && a2 == b2 && a3 >= b3)){
		cout << "YES" << endl;
	}else{
		cout << "NO" << endl;
	}
	return 0;
}