#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ll long long 
#define P pair<int,int>
#define LP pair<ll,ll>
using namespace std;
int main() {
	bool k = 0;
	int a,b,c,e,f,g;
	char u,v,w,x;
	cin >> a >> u >> b >> v >> c >> e >> w >> f >> x >> g;
	if (a > e) k = 1;
	else if (a == e) {
		if (b > f) k = 1;
		else if (b == f) {
			if (c >= g) k = 1;
		}
	}
	if (k) cout << "YES" << endl;
	else cout << "NO" << endl;

	return 0;
}