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

int main() {
	int h1 ,w1 ,h2 ,w2;
	cin >> h1 >> w1;
	cin >> h2 >> w2;
	if (w1 == h2 || w1 == h1 || w2 == h1 || w2 == h2) {
		cout << "YES" << endl;
	} else {
		cout << "NO" << endl;
	}
	return 0;
}