#include <iostream>
using namespace std;

int main() {
    int num;
    cin >> num;
    if (num % 2 == 0) {
        cout << "y e s" << endl;
    } else {
        cout << "n o" << endl;
    }
    return 0;
}    
/**************************************************************
	Problem: 1033
	User: fuyijun
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/