#include<iostream>
#include<string>
#include<cstdlib>

int main() {
	std::string str[2];
	int a[2][3];

	std::cin >> str[0] >> str[1];
	for (int i = 0; i < 2; i++) {
		int count = 0;
		while(str[i].size() != 0) {
			if (str[i].front() == '.'){
				count++;
			}else {
				a[i][count] = a[i][count] * 10 + std::atoi(str[i].c_str());
			}
			str[i].erase(str[i].begin());
		}
	}

	bool old = false;
	if (a[0][0] == a[1][0]) {
		if (a[0][1] == a[1][1]) {
			if (a[0][2] > a[1][2]) {
				old = true;
			}
		} else if (a[0][1] > a[1][1]) {
			old = true;
		}
	} else if(a[0][0] > a[0][1]){
		old = true;
	}

	std::cout << (old ? "YES" : "NO") << std::endl;

	return 0;
}