#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <map>
#include <iomanip>
#include <math.h> 
#include <stack>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <tuple>
#include <cctype>
#include <ctype.h>
#include <set>
#include <sstream>

using namespace std;


int main() {
	int i, j;
	string s1, s2;

	cin >> s1 >> s2;

	int iti1 = 0, iti2 = 0;
	bool flag = false;



	for (i = 0; i < s1.length(); i++) {
		if (s1[i] == '.') {
			if (flag == false) {
				flag = true;
				iti1 = i;
			}
			else {
				iti2 = i;
				break;
			}
		}
	}

	string num1 = (s1.substr(0, iti1));
	string num2 = (s1.substr(iti1 + 1, iti2-iti1 - 1 ));
	string num3 = (s1.substr(iti1 + 1 + iti2 - iti1 - 1 + 1, s1.length() - 1- (iti2 - iti1 - 1 + 1 + 1)));

	//cout << num1 << endl;
	//cout << num2 << endl;
	//cout << num3 << endl;

	 iti1 = 0, iti2 = 0;
	 flag = false;

	for (i = 0; i < s2.length(); i++) {
		if (s2[i] == '.') {
			if (flag == false) {
				flag = true;
				iti1 = i;
			}
			else {
				iti2 = i;
				break;
			}
		}
	}

	string num1b = (s2.substr(0, iti1));
	string num2b = (s2.substr(iti1 + 1, iti2 - iti1 - 1));
	string num3b = (s2.substr(iti1 + 1 + iti2 - iti1 - 1 + 1, s2.length() - 1 - (iti2 - iti1 - 1 + 1 + 1)));

	//cout << num1b << endl;
	//cout << num2b << endl;
	//cout << num3b << endl;

	while (true)
	{
	 

		if (stoi(num1b) > stoi(num1)) {
			cout << "NO" << endl;
			break;
		}
		else if (stoi(num1b) < stoi(num1)) {
			cout << "YES" << endl;
			break;
		}

		if (stoi(num2b) > stoi(num2)) {
			cout << "NO" << endl;
			break;
		}
		else if (stoi(num2b) < stoi(num2)) {
			cout << "YES" << endl;
			break;
		}


		if (stoi(num3b) > stoi(num3)) {
			cout << "NO" << endl;
			break;
		}
		else if (stoi(num3b) <= stoi(num3)) {
			cout << "YES" << endl;
			break;
		}

	}



	getchar();
	getchar();
	return 0;
}