#include <iostream>
using namespace std;

int main()
{
	int a;
	cin >> a;
	if (a%2 == 0)
	{
		cout << "y e s";
	}
	else
	{
		cout << "n o";
	}
}
/**************************************************************
	Problem: 1033
	User: xiaomingze
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/