#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: 21A
	Language: C
	Result: Compile Error
****************************************************************/