#include <stdio.h>

int main() {
  
    int num;
  
    scanf("%d", &num);
  
    if (num % 2 == 0) {
  
        printf("y e s\n");
    } else {
   
        printf("n o\n");
    }
    return 0;
}
/**************************************************************
	Problem: 1033
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:1144 kb
****************************************************************/