#include<stdio.h>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <string>
#include <stdio.h>

using namespace std;

int main() {
	int A[2], B[2], C[2];
	for (int i = 0; i < 2; i++) scanf("%d . %d . %d", &A[i],  &B[i], &C[i]);
	
	bool flag = false;
	/*
	if (A[1] < A[0]) flag = true;
	if(B[1] < B[0] && A[1] == A[0]) flag = true;
	if(C[1] <= C[0] && B[1] == B[0] && A[1] == A[0]) flag = true;
	*/

	long long n1, n2;
	n1 = A[0] * 100000000 + B[0] * 1000 + C[0];
	n2 = A[1] * 100000000 + B[1] * 1000 + C[1];

	if (n1 >= n2) flag = true;

	if (flag) cout << "YES" << endl;
	else cout << "NO" << endl;

	return 0;
}