int main()
{
    String a, b, c, d;
    cin >> a;
    cin >> c;
    cin >> b;

    d = String("==");
    if(c == d){
        if(a == b) cout << "YES";
        else cout << "NO";
    }
    else{
        d = String("!=");
        if(c == d){
            if(a != b) cout << "YES";
            else cout << "NO";
        }
        else{
            d = String(">=");
            if(c == d){
                if(a >= b) cout << "YES";
                else cout << "NO";
            }
            else{
                d = String("<=");
                if(c == d){
                    if(a <= b) cout << "YES";
                    else cout << "NO";
                }
                else{
                    d = String("<");
                    if(c == d){
                        if(a < b) cout << "YES";
                        else cout << "NO";
                    }
                    else{
                        d = String(">");
                        if(c == d){
                            if(a > b) cout << "YES";
                            else cout << "NO";
                        }
                    }
                }
            }
        }
    }
}