#include <iostream>

int main(){
	int a[2], b[2], c[2];
	char ch;
	for (int i = 0; i < 2; ++i)std::cin >> a[i] >> ch >> b[i] >> ch >> c[i];
	bool f;
	if (a[0] == a[1]){
		if (b[0] == b[1])f = (c[0] >= c[1]);
		else f = (b[0] >= b[1]);
	}
	else f = (a[0] >= a[1]);

	if (f)std::cout << "YES" << std::endl;
	else std::cout << "NO" << std::endl;
	return 0;
}