#include <iostream>
#include <cstring>
#include<cstdio>
#include <cstdlib>
using namespace std;
char sir[200];
int main()
{
 //freopen("date.in","r",stdin);
 //freopen("date.out","w",stdout);
 cin>>sir;

if(strstr(sir,"Yardi"))cout<<"YES";
else cout<<"NO";





    return 0;
}