#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(int i = 0; i < (n); i++)
#define rep1(i, n) for(int i = 1; i <= (n); i++)
#define co(x) cout << (x) << "\n"
#define cosp(x) cout << (x) << " "
#define ce(x) cerr << (x) << "\n"
#define cesp(x) cerr << (x) << " "
#define pb push_back
#define mp make_pair
#define Would
#define you
#define please

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);


	int A, B, C;
	int A1, B1, C1;
	char c;
	cin >> A >> c >> B >> c >> C;
	cin >> A1 >> c >> B1 >> c >> C1;

	if (A < A1) co("NO");
	else if (A == A1) {
		if (B < B1) co("NO");
		else if (B == B1) {
			if (C < C1) co("NO");
			else co("YES");
		}
		else co("YES");
	}
	else co("YES");



	Would you please return 0;
}