#include<bits/stdc++.h>
using namespace std;
int main() {
	int n;
	cin>>n;
	if(n%2==0)
		cout<<"y e s";
		else cout<<"n o";	 
    return 0;
}

/**************************************************************
	Problem: 1033
	User: huangcanwu
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/