#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: hbq
	Language: C
	Result: Compile Error
****************************************************************/