#include "bits/stdc++.h"
using namespace std;

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