#include <iostream>
#include <string>
using namespace std;

int main()
{
	string S0, S1;
	cin >> S0 >> S1;

	S0.erase(S0.begin() + S0.find('.')); S0.erase(S0.begin() + S0.find('.'));
	S1.erase(S1.begin() + S1.find('.')); S1.erase(S1.begin() + S1.find('.'));

	cout << ((stoi(S1) <= stoi(S0)) ? "YES" : "NO") << endl;
	
	return 0;
}