#include<iostream>
using namespace std;
int version(){
	int a, b, c;
	scanf("%d.%d.%d", &a, &b, &c);
	return (a * 1000000 + b * 1000 + c);
}
int main(void){
	cout << ((version() >= version()) ? "YES" : "NO") << endl;
	return 0;
}