#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: lzc
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/