#include <iostream>
#include <string>
using namespace std;

int main(){
	const string primerjava = "Yardi";
	string s;
	cin>>s;

	for(int i=0; i<((int)s.size()-(int)primerjava.size()); i++){
		if(s.substr(i, primerjava.size()).compare(primerjava) == 0){
			cout<<"YES";
			return 0;
		}
	}
	cout<<"NO";

	return 0;
}