#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: lyy002
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/