#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <cmath>
#include <cstdlib>
#include <sstream>
#include <cstdio>
#include <iterator>

#define N 1000
#define re(i,n) for(int i=0;i<(n);i++)
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define fe(i,n,f) for_each(i,n,f)
using namespace std;

typedef long long ll;

int main(void){
	int a,b,c,a1,b1,c1;
	scanf("%d.%d.%d",&a,&b,&c);
	scanf("%d.%d.%d",&a1,&b1,&c1);
	if(a>a1)goto y;
	else if(a<a1)goto n;
	if(b>b1)goto y;
	else if(b<b1)goto n;
	if(c>c1)goto y;
	else if(c<c1)goto n;
	else goto y;
y:;
	cout<<"YES"<<endl;
	return 0;
n:;
	cout<<"NO"<<endl;
	return 0;
}