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

int main()
{
	string S0, S1;
	double s0, s1;
	cin >> S0 >> S1;

	s0 = stod(S0.substr(0, S0.rfind('.')));
	s1 = stod(S1.substr(0, S1.rfind('.')));

	if(s1 > s0)
	{
		cout << "NO" << endl;
		return 0;
	}
	
	s0 = stod(S0.substr(S0.find('.') + 1, S0.length() - S0.find('.') + 1));
	s1 = stod(S1.substr(S1.find('.') + 1, S1.length() - S1.find('.') + 1));

	if(s1 > s0)
	{
		cout << "NO" << endl;
		return 0;
	}
	
	cout << "YES" << endl;
	return 0;
}