#include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <map>
#include <list>
#include <deque>
#include <algorithm>

using namespace std;

int versionCheck(vector<int> list0, vector<int>list1){
	bool flag = false;

	if (list0[0] > list1[0]) {
		//古い
		flag = true;
		return flag;
	}

	if (list0[0] == list1[0]) {

		if (list0[1] > list1[1]) {
			//古い
			flag = true;
			return flag;
		}

		if (list0[1] == list1[1]) {
			if (list0[2] >= list1[2]) {
				//古い
				flag = true;
				return flag;
			}
		}
	}
	return flag;
}

int main() {
	int a0, b0, c0;
	int a1, b1, c1;
	scanf("%d.%d.%d", &a0, &b0, &c0);
	scanf("%d.%d.%d", &a1, &b1, &c1);

	vector<int>list0;
	vector<int>list1;

	list0.push_back(a0);
	list0.push_back(b0);
	list0.push_back(c0);

	list1.push_back(a1);
	list1.push_back(b1);
	list1.push_back(c1);
	
	if (versionCheck(list0, list1)) cout << "YES" << endl;
	else cout << "NO" << endl;
	return 0;
}