#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b;
    cin>>a;
    b=a%2;
    if(b==0){
        cout<<"y e s";
    }
    else{
        cout<<"n o";
    }
} 
/**************************************************************
	Problem: 1033
	User: wengzihang
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/