//#include <atcoder/all>
#include <bits/stdc++.h>
#include <cmath>
using namespace std;
//using namespace atcoder;
using ll = long long;
#define all(A) A.begin(),A.end()
using vll = vector<ll>;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
using Graph = vector<vector<ll>>;

int main() {
	ll S,T;char P;
	cin>>S>>T>>P;
	if(S==T){
		if(P=='=')cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	}
	else if(S<T){
		if(P=='<')cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	}
	else{
		if(P=='>')cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	}
}