#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: wqc123
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/