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

/**************************************************************
	Problem: 1033
	User: ccf
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/