#include<bits/stdc++.h>
using namespace std;
long double q,w,e,r,t,y,u,i,o,p,d,f,g,h,j,k,l,z,x,c,v,b,n,m;
string s;
long long a[100000],as[100000],asd[100000];
int main()
{
	cin>>n>>m;
	if(n<=m)
	cout<<"YE5";
	else cout<<"N0";
    return 0;
}